diff --git a/Libraries/LibWeb/CSS/StyleValues/CSSColorValue.cpp b/Libraries/LibWeb/CSS/StyleValues/CSSColorValue.cpp
index 5495fc10e37..71d2625c648 100644
--- a/Libraries/LibWeb/CSS/StyleValues/CSSColorValue.cpp
+++ b/Libraries/LibWeb/CSS/StyleValues/CSSColorValue.cpp
@@ -45,7 +45,7 @@ ValueComparingNonnullRefPtr<CSSColorValue> CSSColorValue::create_from_color(Colo
     return make_rgb_color(color);
 }
 
-Optional<float> CSSColorValue::resolve_hue(CSSStyleValue const& style_value)
+Optional<double> CSSColorValue::resolve_hue(CSSStyleValue const& style_value)
 {
     // <number> | <angle> | none
     auto normalized = [](double number) {
@@ -67,11 +67,11 @@ Optional<float> CSSColorValue::resolve_hue(CSSStyleValue const& style_value)
     return {};
 }
 
-Optional<float> CSSColorValue::resolve_with_reference_value(CSSStyleValue const& style_value, float one_hundred_percent_value)
+Optional<double> CSSColorValue::resolve_with_reference_value(CSSStyleValue const& style_value, float one_hundred_percent_value)
 {
     // <percentage> | <number> | none
     auto normalize_percentage = [one_hundred_percent_value](Percentage const& percentage) {
-        return static_cast<float>(percentage.as_fraction()) * one_hundred_percent_value;
+        return percentage.as_fraction() * one_hundred_percent_value;
     };
 
     if (style_value.is_percentage())
@@ -94,7 +94,7 @@ Optional<float> CSSColorValue::resolve_with_reference_value(CSSStyleValue const&
     return {};
 }
 
-Optional<float> CSSColorValue::resolve_alpha(CSSStyleValue const& style_value)
+Optional<double> CSSColorValue::resolve_alpha(CSSStyleValue const& style_value)
 {
     // <number> | <percentage> | none
     auto normalized = [](double number) {
diff --git a/Libraries/LibWeb/CSS/StyleValues/CSSColorValue.h b/Libraries/LibWeb/CSS/StyleValues/CSSColorValue.h
index 0e57d0e0038..8276dcff90f 100644
--- a/Libraries/LibWeb/CSS/StyleValues/CSSColorValue.h
+++ b/Libraries/LibWeb/CSS/StyleValues/CSSColorValue.h
@@ -48,9 +48,9 @@ protected:
     {
     }
 
-    static Optional<float> resolve_hue(CSSStyleValue const&);
-    static Optional<float> resolve_with_reference_value(CSSStyleValue const&, float one_hundred_percent_value);
-    static Optional<float> resolve_alpha(CSSStyleValue const&);
+    static Optional<double> resolve_hue(CSSStyleValue const&);
+    static Optional<double> resolve_with_reference_value(CSSStyleValue const&, float one_hundred_percent_value);
+    static Optional<double> resolve_alpha(CSSStyleValue const&);
 
 private:
     ColorType m_color_type;