diff --git a/layout/style/nsCSSPropList.h b/layout/style/nsCSSPropList.h
index 0d29aaa234fe..8679aafaaec5 100644
--- a/layout/style/nsCSSPropList.h
+++ b/layout/style/nsCSSPropList.h
@@ -526,7 +526,6 @@ CSS_PROP_BACKGROUND(
     CSS_PROPERTY_PARSE_VALUE |
         CSS_PROPERTY_APPLIES_TO_FIRST_LETTER_AND_FIRST_LINE |
         CSS_PROPERTY_APPLIES_TO_PLACEHOLDER |
-        CSS_PROPERTY_IGNORED_WHEN_COLORS_DISABLED |
         CSS_PROPERTY_HASHLESS_COLOR_QUIRK,
     "",
     VARIANT_HC,
@@ -541,7 +540,6 @@ CSS_PROP_BACKGROUND(
         CSS_PROPERTY_APPLIES_TO_FIRST_LETTER_AND_FIRST_LINE |
         CSS_PROPERTY_APPLIES_TO_PLACEHOLDER |
         CSS_PROPERTY_VALUE_LIST_USES_COMMAS |
-        CSS_PROPERTY_IGNORED_WHEN_COLORS_DISABLED |
         CSS_PROPERTY_START_IMAGE_LOADS,
     "",
     VARIANT_IMAGE, // used by list parsing
@@ -768,7 +766,6 @@ CSS_PROP_BORDER(
     BorderBottomColor,
     CSS_PROPERTY_PARSE_VALUE |
         CSS_PROPERTY_APPLIES_TO_FIRST_LETTER |
-        CSS_PROPERTY_IGNORED_WHEN_COLORS_DISABLED |
         CSS_PROPERTY_HASHLESS_COLOR_QUIRK,
     "",
     VARIANT_HC,
@@ -1009,8 +1006,7 @@ CSS_PROP_BORDER(
     BorderLeftColor,
     CSS_PROPERTY_PARSE_VALUE |
         CSS_PROPERTY_HASHLESS_COLOR_QUIRK |
-        CSS_PROPERTY_APPLIES_TO_FIRST_LETTER |
-        CSS_PROPERTY_IGNORED_WHEN_COLORS_DISABLED,
+        CSS_PROPERTY_APPLIES_TO_FIRST_LETTER,
     "",
     VARIANT_HC,
     nullptr,
@@ -1058,8 +1054,7 @@ CSS_PROP_BORDER(
     BorderRightColor,
     CSS_PROPERTY_PARSE_VALUE |
         CSS_PROPERTY_HASHLESS_COLOR_QUIRK |
-        CSS_PROPERTY_APPLIES_TO_FIRST_LETTER |
-        CSS_PROPERTY_IGNORED_WHEN_COLORS_DISABLED,
+        CSS_PROPERTY_APPLIES_TO_FIRST_LETTER,
     "",
     VARIANT_HC,
     nullptr,
@@ -1118,7 +1113,6 @@ CSS_PROP_BORDER(
     BorderTopColor,
     CSS_PROPERTY_PARSE_VALUE |
         CSS_PROPERTY_APPLIES_TO_FIRST_LETTER |
-        CSS_PROPERTY_IGNORED_WHEN_COLORS_DISABLED |
         CSS_PROPERTY_HASHLESS_COLOR_QUIRK,
     "",
     VARIANT_HC,
@@ -1269,8 +1263,7 @@ CSS_PROP_EFFECTS(
     BoxShadow,
     CSS_PROPERTY_PARSE_FUNCTION |
         CSS_PROPERTY_APPLIES_TO_FIRST_LETTER |
-        CSS_PROPERTY_VALUE_LIST_USES_COMMAS |
-        CSS_PROPERTY_IGNORED_WHEN_COLORS_DISABLED,
+        CSS_PROPERTY_VALUE_LIST_USES_COMMAS,
         // NOTE: some components must be nonnegative
     "",
     VARIANT_COLOR | VARIANT_LENGTH | VARIANT_CALC | VARIANT_INHERIT | VARIANT_NONE,
@@ -1301,8 +1294,7 @@ CSS_PROP_USERINTERFACE(
     caret-color,
     caret_color,
     CaretColor,
-    CSS_PROPERTY_PARSE_VALUE |
-        CSS_PROPERTY_IGNORED_WHEN_COLORS_DISABLED,
+    CSS_PROPERTY_PARSE_VALUE,
     "",
     VARIANT_AUTO | VARIANT_HC,
     nullptr,
@@ -1359,7 +1351,6 @@ CSS_PROP_COLOR(
     CSS_PROPERTY_PARSE_VALUE |
         CSS_PROPERTY_APPLIES_TO_FIRST_LETTER_AND_FIRST_LINE |
         CSS_PROPERTY_APPLIES_TO_PLACEHOLDER |
-        CSS_PROPERTY_IGNORED_WHEN_COLORS_DISABLED |
         CSS_PROPERTY_HASHLESS_COLOR_QUIRK,
     "",
     VARIANT_HC,
@@ -1436,8 +1427,7 @@ CSS_PROP_COLUMN(
     column-rule-color,
     column_rule_color,
     ColumnRuleColor,
-    CSS_PROPERTY_PARSE_VALUE |
-        CSS_PROPERTY_IGNORED_WHEN_COLORS_DISABLED,
+    CSS_PROPERTY_PARSE_VALUE,
     "",
     VARIANT_HC,
     nullptr,
@@ -3028,8 +3018,7 @@ CSS_PROP_OUTLINE(
     outline-color,
     outline_color,
     OutlineColor,
-    CSS_PROPERTY_PARSE_VALUE |
-        CSS_PROPERTY_IGNORED_WHEN_COLORS_DISABLED,
+    CSS_PROPERTY_PARSE_VALUE,
     "",
     VARIANT_HC,
     nullptr,
@@ -3905,8 +3894,7 @@ CSS_PROP_TEXTRESET(
     TextDecorationColor,
     CSS_PROPERTY_PARSE_VALUE |
         CSS_PROPERTY_APPLIES_TO_FIRST_LETTER_AND_FIRST_LINE |
-        CSS_PROPERTY_APPLIES_TO_PLACEHOLDER |
-        CSS_PROPERTY_IGNORED_WHEN_COLORS_DISABLED,
+        CSS_PROPERTY_APPLIES_TO_PLACEHOLDER,
     "",
     VARIANT_HC,
     nullptr,
@@ -3947,8 +3935,7 @@ CSS_PROP_TEXT(
     text-emphasis-color,
     text_emphasis_color,
     TextEmphasisColor,
-    CSS_PROPERTY_PARSE_VALUE |
-        CSS_PROPERTY_IGNORED_WHEN_COLORS_DISABLED,
+    CSS_PROPERTY_PARSE_VALUE,
     "",
     VARIANT_HC,
     nullptr,
@@ -3982,8 +3969,7 @@ CSS_PROP_TEXT(
     WebkitTextFillColor,
     CSS_PROPERTY_PARSE_VALUE |
         CSS_PROPERTY_APPLIES_TO_FIRST_LETTER_AND_FIRST_LINE |
-        CSS_PROPERTY_APPLIES_TO_PLACEHOLDER |
-        CSS_PROPERTY_IGNORED_WHEN_COLORS_DISABLED,
+        CSS_PROPERTY_APPLIES_TO_PLACEHOLDER,
     "layout.css.prefixes.webkit",
     VARIANT_HC,
     nullptr,
@@ -4051,8 +4037,7 @@ CSS_PROP_TEXT(
     CSS_PROPERTY_PARSE_FUNCTION |
         CSS_PROPERTY_APPLIES_TO_FIRST_LETTER_AND_FIRST_LINE |
         CSS_PROPERTY_APPLIES_TO_PLACEHOLDER |
-        CSS_PROPERTY_VALUE_LIST_USES_COMMAS |
-        CSS_PROPERTY_IGNORED_WHEN_COLORS_DISABLED,
+        CSS_PROPERTY_VALUE_LIST_USES_COMMAS,
         // NOTE: some components must be nonnegative
     "",
     VARIANT_COLOR | VARIANT_LENGTH | VARIANT_CALC | VARIANT_INHERIT | VARIANT_NONE,
@@ -4081,8 +4066,7 @@ CSS_PROP_TEXT(
     WebkitTextStrokeColor,
     CSS_PROPERTY_PARSE_VALUE |
         CSS_PROPERTY_APPLIES_TO_FIRST_LETTER_AND_FIRST_LINE |
-        CSS_PROPERTY_APPLIES_TO_PLACEHOLDER |
-        CSS_PROPERTY_IGNORED_WHEN_COLORS_DISABLED,
+        CSS_PROPERTY_APPLIES_TO_PLACEHOLDER,
     "layout.css.prefixes.webkit",
     VARIANT_HC,
     nullptr,
diff --git a/layout/style/nsCSSProps.cpp b/layout/style/nsCSSProps.cpp
index c3446c1125f0..6207eb2330fb 100644
--- a/layout/style/nsCSSProps.cpp
+++ b/layout/style/nsCSSProps.cpp
@@ -3103,9 +3103,6 @@ nsCSSProps::kParserVariantTable[eCSSProperty_COUNT_no_shorthands] = {
   static_assert((flags_) & CSS_PROPERTY_LOGICAL,                            \
                 "properties defined with CSS_PROP_LOGICAL must also use "   \
                 "the CSS_PROPERTY_LOGICAL flag");                           \
-  static_assert(!((flags_) & CSS_PROPERTY_IGNORED_WHEN_COLORS_DISABLED),    \
-                "CSS_PROPERTY_IGNORED_WHEN_COLORS_DISABLED has no effect "  \
-                "on logical properties");                                   \
   static_assert(!(((flags_) & CSS_PROPERTY_LOGICAL_AXIS) &&                 \
                   ((flags_) & CSS_PROPERTY_LOGICAL_END_EDGE)),              \
                 "CSS_PROPERTY_LOGICAL_END_EDGE makes no sense when used "   \
diff --git a/layout/style/nsCSSProps.h b/layout/style/nsCSSProps.h
index c40706030a03..0cb87358e7eb 100644
--- a/layout/style/nsCSSProps.h
+++ b/layout/style/nsCSSProps.h
@@ -134,10 +134,6 @@
 #define CSS_PROPERTY_APPLIES_TO_FIRST_LETTER_AND_FIRST_LINE \
   (CSS_PROPERTY_APPLIES_TO_FIRST_LETTER | CSS_PROPERTY_APPLIES_TO_FIRST_LINE)
 
-// Note that 'background-color' is ignored differently from the other
-// properties that have this set, but that's just special-cased.
-#define CSS_PROPERTY_IGNORED_WHEN_COLORS_DISABLED (1<<4)
-
 // A property that needs to have image loads started when a URL value
 // for the property is used for an element.  This is supported only
 // for a few possible value formats: image directly in the value; list