diff --git a/lib/sass/value/color.rb b/lib/sass/value/color.rb
index 8eb0662..75f06d0 100644
--- a/lib/sass/value/color.rb
+++ b/lib/sass/value/color.rb
@@ -569,8 +569,8 @@ def _analogous_channel_missing?(original, output, output_channel_index)
 
         return false if original.equal?(output)
 
-        output_channel = output.space.channels[output_channel_index]
-        original_channel = original.space.channels.find do |channel|
+        output_channel = output._space.channels[output_channel_index]
+        original_channel = original._space.channels.find do |channel|
           output_channel.analogous?(channel)
         end
 
diff --git a/spec/sass/value/color/interpolation_examples.rb b/spec/sass/value/color/interpolation_examples.rb
index 68467b1..ff4b507 100644
--- a/spec/sass/value/color/interpolation_examples.rb
+++ b/spec/sass/value/color/interpolation_examples.rb
@@ -7,7 +7,7 @@
       {
         weight: 0.5
       },
-      [58.614201646094955, 10.016665992350433, -8.387820174394456]
+      [58.614201693004674, 10.016667522478151, -8.387819651868517]
     ],
     [
       {
@@ -19,7 +19,7 @@
       {
         weight: 0
       },
-      [38.95792456574883, -15.169549415088852, -17.792484605053115]
+      [38.957924659568256, -15.169546354833418, -17.792483560001216]
     ]
   ],
   oklab: [
@@ -27,19 +27,19 @@
       {
         weight: 0.5
       },
-      [0.6476500020040917, 0.02748550994678843, -0.023408287379941606]
+      [0.6476500060804854, 0.027485511076670896, -0.023408311310399166]
     ],
     [
       {
         weight: 1
       },
-      [0.8241000000000002, 0.10608808442731632, 0.0015900762693974446]
+      [0.8241000051752044, 0.10608808769190603, 0.0015900461037656743]
     ],
     [
       {
         weight: 0
       },
-      [0.47120000400818335, -0.05111706453373946, -0.048406651029280656]
+      [0.47120000698576636, -0.05111706553856424, -0.048406668724564006]
     ]
   ],
   lch: [
@@ -47,7 +47,7 @@
       {
         weight: 0.5
       },
-      [58.61420164622054, 29.299459370089924, 295.6021177856686]
+      [58.614201693004674, 29.299457976259603, 295.6021198088788]
     ],
     [
       {
@@ -59,35 +59,35 @@
       {
         weight: 0
       },
-      [38.957924566, 23.38135449889311, 229.5496923459574]
+      [38.957924659568256, 23.381351711232465, 229.54969639237788]
     ],
     [
       {
         weight: 0.5,
         method: 'shorter'
       },
-      [58.61420164622054, 29.299459370089924, 295.6021177856686]
+      [58.614201693004674, 29.299457976259603, 295.6021198088788]
     ],
     [
       {
         weight: 0.5,
         method: 'longer'
       },
-      [58.61420164622054, 29.299459370089924, 115.60211778566858]
+      [58.614201693004674, 29.299457976259603, 115.6021198088788]
     ],
     [
       {
         weight: 0.5,
         method: 'increasing'
       },
-      [58.61420164622054, 29.299459370089924, 115.60211778566858]
+      [58.614201693004674, 29.299457976259603, 115.6021198088788]
     ],
     [
       {
         weight: 0.5,
         method: 'decreasing'
       },
-      [58.61420164622054, 29.299459370089924, 295.6021177856686]
+      [58.614201693004674, 29.299457976259603, 295.6021198088788]
     ]
   ],
   oklch: [
@@ -95,47 +95,47 @@
       {
         weight: 0.5
       },
-      [0.6476500020040917, 0.08824999343187809, 292.1493505923757]
+      [0.6476500060804854, 0.0882500012863419, 292.1493473823782]
     ],
     [
       {
         weight: 1
       },
-      [0.8241, 0.1061, 0.8586999999999989]
+      [0.8241000051752044, 0.1061000028121472, 0.8586836854624949]
     ],
     [
       {
         weight: 0
       },
-      [0.47120000400818335, 0.07039998686375618, 223.4400011847514]
+      [0.47120000698576636, 0.07039999976053661, 223.44001107929404]
     ],
     [
       {
         weight: 0.5,
         method: 'shorter'
       },
-      [0.6476500020040917, 0.08824999343187809, 292.1493505923757]
+      [0.6476500060804854, 0.0882500012863419, 292.1493473823782]
     ],
     [
       {
         weight: 0.5,
         method: 'longer'
       },
-      [0.6476500020040917, 0.08824999343187809, 112.1493505923757]
+      [0.6476500060804854, 0.0882500012863419, 112.14934738237824]
     ],
     [
       {
         weight: 0.5,
         method: 'increasing'
       },
-      [0.6476500020040917, 0.08824999343187809, 112.1493505923757]
+      [0.6476500060804854, 0.0882500012863419, 112.14934738237824]
     ],
     [
       {
         weight: 0.5,
         method: 'decreasing'
       },
-      [0.6476500020040917, 0.08824999343187809, 292.1493505923757]
+      [0.6476500060804854, 0.0882500012863419, 292.1493473823782]
     ]
   ],
   srgb: [
@@ -223,7 +223,7 @@
       {
         weight: 0.5
       },
-      [0.5427623847027483, 0.4757813439417372, 0.5419635636962455]
+      [0.5427628071521571, 0.4757810859208764, 0.5419635611723659]
     ],
     [
       {
@@ -235,7 +235,7 @@
       {
         weight: 0
       },
-      [0.2431790331963506, 0.3045087255847488, 0.38356879501347535]
+      [0.24317987809516806, 0.304508209543027, 0.3835687899657161]
     ]
   ],
   rec2020: [
@@ -283,7 +283,7 @@
       {
         weight: 0.5
       },
-      [0.3740759617070767, 0.3215358224064546, 0.2908164562135577]
+      [0.37407596368010154, 0.32153582267804004, 0.29081645447205257]
     ],
     [
       {
@@ -295,7 +295,7 @@
       {
         weight: 0
       },
-      [0.08408207011375313, 0.10634498228480066, 0.14703708775508573]
+      [0.08408207405980274, 0.10634498282797152, 0.14703708427207543]
     ]
   ],
   rgb: [
@@ -303,7 +303,7 @@
       {
         weight: 0.5
       },
-      [146.56944672156501, 134.1448156837381, 157.00580432872178]
+      [146.49494601036622, 133.9494959758061, 156.77020571682615]
     ],
     [
       {
@@ -315,7 +315,7 @@
       {
         weight: 0
       },
-      [38.14436413378462, 100.00369046118837, 120.62648929056449]
+      [37.99536271138702, 99.61305104532435, 120.15529206677323]
     ]
   ],
   hsl: [
diff --git a/spec/sass/value/color/spaces.rb b/spec/sass/value/color/spaces.rb
index 6cca474..b18da24 100644
--- a/spec/sass/value/color/spaces.rb
+++ b/spec/sass/value/color/spaces.rb
@@ -9,8 +9,8 @@
     name: 'lab',
     is_legacy: false,
     is_polar: false,
-    pink: [78.27047872644108, 35.20288139978972, 1.0168442562642044],
-    blue: [38.95792456574883, -15.169549415088856, -17.792484605053115],
+    pink: [78.27047872644108, 35.20288139978972, 1.0168442562641822],
+    blue: [38.957924659568256, -15.169546354833418, -17.792483560001216],
     channels: %w[lightness a b],
     ranges: [
       [0, 100],
@@ -30,8 +30,8 @@
     name: 'oklab',
     is_legacy: false,
     is_polar: false,
-    pink: [0.8241000000000002, 0.10608808442731632, 0.0015900762693974446],
-    blue: [0.47120000400818335, -0.05111706453373946, -0.048406651029280656],
+    pink: [0.8241000051752044, 0.10608808769190603, 0.0015900461037656743],
+    blue: [0.47120000698576636, -0.05111706553856424, -0.048406668724564006],
     channels: %w[lightness a b],
     ranges: [
       [0, 1],
@@ -51,8 +51,8 @@
     name: 'lch',
     is_legacy: false,
     is_polar: true,
-    pink: [78.27047872644108, 35.21756424128674, 1.6545432253797676],
-    blue: [38.957924566, 23.38135449889311, 229.54969234595737],
+    pink: [78.27047872644108, 35.21756424128674, 1.6545432253797117],
+    blue: [38.957924659568256, 23.381351711232465, 229.54969639237788],
     channels: %w[lightness chroma hue],
     has_powerless: true,
     ranges: [
@@ -73,8 +73,8 @@
     name: 'oklch',
     is_legacy: false,
     is_polar: true,
-    pink: [0.8241, 0.1061, 0.8587],
-    blue: [0.47120000400818335, 0.07039998686375618, 223.44000118475142],
+    pink: [0.8241000051752044, 0.1061000028121472, 0.8586836854624949],
+    blue: [0.47120000698576636, 0.07039999976053661, 223.44001107929404],
     channels: %w[lightness chroma hue],
     has_powerless: true,
     ranges: [
@@ -95,7 +95,7 @@
     name: 'srgb',
     is_legacy: false,
     is_polar: false,
-    pink: [0.9999785463111585, 0.6599448662991679, 0.758373017125016],
+    pink: [0.9999785463111587, 0.6599448662991679, 0.7583730171250161],
     blue: [0.14900142239759614, 0.39063941586401707, 0.47119722379126755],
     channels: %w[red green blue],
     ranges: [
@@ -113,7 +113,7 @@
     name: 'srgb-linear',
     is_legacy: false,
     is_polar: false,
-    pink: [0.999951196094508, 0.3930503811476254, 0.5356603778005655],
+    pink: [0.9999511960945082, 0.39305038114762536, 0.5356603778005656],
     blue: [0.019378214827482948, 0.12640222770203852, 0.18834349393523495],
     channels: %w[red green blue],
     ranges: [
@@ -149,7 +149,7 @@
     name: 'a98-rgb',
     is_legacy: false,
     is_polar: false,
-    pink: [0.9172837001828321, 0.6540226622083835, 0.7491144397116841],
+    pink: [0.9172837001828322, 0.6540226622083833, 0.749114439711684],
     blue: [0.2557909283504703, 0.3904466064332277, 0.4651826475952292],
     channels: %w[red green blue],
     ranges: [
@@ -167,8 +167,8 @@
     name: 'prophoto-rgb',
     is_legacy: false,
     is_polar: false,
-    pink: [0.842345736209146, 0.6470539622987257, 0.7003583323790157],
-    blue: [0.24317903319635056, 0.3045087255847488, 0.38356879501347535],
+    pink: [0.842345736209146, 0.6470539622987259, 0.7003583323790157],
+    blue: [0.24317987809516806, 0.304508209543027, 0.3835687899657161],
     channels: %w[red green blue],
     ranges: [
       [0, 1],
@@ -185,8 +185,8 @@
     name: 'rec2020',
     is_legacy: false,
     is_polar: false,
-    pink: [0.8837118321235519, 0.6578067923850563, 0.7273197917658354],
-    blue: [0.2151122740532409, 0.32363973150195124, 0.4090033869684574],
+    pink: [0.883711832123552, 0.6578067923850561, 0.7273197917658352],
+    blue: [0.21511227405324085, 0.3236397315019512, 0.4090033869684574],
     channels: %w[red green blue],
     ranges: [
       [0, 1],
@@ -224,8 +224,8 @@
     name: 'xyz-d50',
     is_legacy: false,
     is_polar: false,
-    pink: [0.6640698533004002, 0.5367266625281085, 0.4345958246720296],
-    blue: [0.08408207011375313, 0.10634498228480066, 0.1470370877550857],
+    pink: [0.6640698533004004, 0.5367266625281086, 0.43459582467202973],
+    blue: [0.08408207405980274, 0.10634498282797152, 0.14703708427207543],
     channels: %w[x y z],
     ranges: [
       [0, 1],
@@ -266,8 +266,8 @@
     name: 'rgb',
     is_legacy: true,
     is_polar: false,
-    pink: [254.9945293093454, 168.28594090628783, 193.38511936687908],
-    blue: [38.144364133784602, 100.003690461188378, 120.626489290564506],
+    pink: [254.99452930934547, 168.28594090628783, 193.3851193668791],
+    blue: [37.99536271138702, 99.61305104532435, 120.15529206677323],
     channels: %w[red green blue],
     ranges: [
       [0, 255],
@@ -287,7 +287,7 @@
     name: 'hsl',
     is_legacy: true,
     is_polar: true,
-    pink: [342.63204677447646, 99.98738302509669, 82.99617063051632],
+    pink: [342.63204677447646, 99.98738302509679, 82.99617063051633],
     blue: [195.0016494775154, 51.95041997811069, 31.009932309443183],
     channels: %w[hue saturation lightness],
     has_powerless: true,
@@ -302,7 +302,7 @@
         [0.5, 110, 50],
         {
           clip: [0.5, 100, 50],
-          'local-minde': [2.9140262667138472, 100, 52.05146874647547]
+          'local-minde': [2.9140266584158057, 100, 52.05146824961835]
         }
       ]
     ]
@@ -312,7 +312,7 @@
     name: 'hwb',
     is_legacy: true,
     is_polar: true,
-    pink: [342.63204677447646, 65.99448662991679, 0.002145368884157506],
+    pink: [342.63204677447646, 65.9944866299168, 0.002145368884129084],
     blue: [195.0016494775154, 14.900142239759612, 52.880277620873244],
     channels: %w[hue whiteness blackness],
     has_powerless: true,
@@ -327,7 +327,7 @@
         [0.5, -3, -7],
         {
           clip: [0.5, 0, 0],
-          'local-minde': [3.492121744609392, 11.26651892207301, 0]
+          'local-minde': [3.492122559065345, 11.266517197307957, 0]
         }
       ]
     ]
diff --git a/spec/sass/value/color_4_conversions_spec.rb b/spec/sass/value/color_4_conversions_spec.rb
index 6bb03fa..a341a64 100644
--- a/spec/sass/value/color_4_conversions_spec.rb
+++ b/spec/sass/value/color_4_conversions_spec.rb
@@ -155,5 +155,21 @@
         end
       end
     end
+
+    describe 'interpolate()' do
+      it 'interpolates a rectangular space without options' do
+        expect(
+          described_class.new(red: 100, green: 200, blue: 50)
+            .interpolate(described_class.new(red: 255, green: 255, blue: 255))
+        ).to eq(described_class.new(red: 177.5, green: 227.5, blue: 152.5))
+      end
+
+      it 'interpolates a polar space without options' do
+        expect(
+          described_class.new(hue: 180, saturation: 100, lightness: 50)
+            .interpolate(described_class.new(red: 100, green: 200, blue: 50))
+        ).to eq(described_class.new(hue: 140, saturation: 80, lightness: 49.509803921568626))
+      end
+    end
   end
 end
diff --git a/spec/sass/value/color_4_nonparametizable_spec.rb b/spec/sass/value/color_4_nonparametizable_spec.rb
index 1cdf286..ffd0233 100644
--- a/spec/sass/value/color_4_nonparametizable_spec.rb
+++ b/spec/sass/value/color_4_nonparametizable_spec.rb
@@ -14,14 +14,14 @@
           'display-p3',
           {
             'local-minde': ColorConstructors.oklch(
-              0.8077756841698541,
-              0.3262439045095262,
-              148.12027402754507
+              0.8077756760084225,
+              0.32624391948277537,
+              148.1202761637585
             ),
             clip: ColorConstructors.oklch(
-              0.848829286984103,
-              0.3685278106366152,
-              145.64495037017775
+              0.8488292928532466,
+              0.3685277976813825,
+              145.64495558662838
             )
           }
         ],
@@ -30,14 +30,14 @@
           'srgb',
           {
             'local-minde': ColorConstructors.oklch(
-              0.809152570178515,
-              0.23790275760347995,
-              147.40214776873552
+              0.809152561530627,
+              0.23790276994468387,
+              147.40215048389234
             ),
             clip: ColorConstructors.oklch(
-              0.8664396115356694,
-              0.2948272403370167,
-              142.49533888780996
+              0.8664396175234368,
+              0.2948272245426958,
+              142.4953450414439
             )
           }
         ]
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index b281b28..c056fe7 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -44,8 +44,7 @@
   supports_block_expectations
 end
 
-# TODO: test with higher precision
-precision = Sass::Value.const_get(:FuzzyMath)::PRECISION - 6
+precision = Sass::Value.const_get(:FuzzyMath)::PRECISION + 1
 
 RSpec::Matchers.matcher :fuzzy_eq do |expected|
   match do |actual|
@@ -56,7 +55,7 @@
       expect(actual.channels_or_nil).to fuzzy_match_array(expected.channels_or_nil)
       expect(actual.channel_missing?('alpha')).to eq(expected.channel_missing?('alpha'))
       expect(actual.alpha).to fuzzy_eq(expected.alpha)
-      # expect(actual).to eq(expected)
+      expect(actual).to eq(expected)
     when Numeric
       expect(actual).to be_within(10**-precision).of(expected)
     else