diff --git a/core/color.cpp b/core/color.cpp
index cb3068c4874..03aeb2085ba 100644
--- a/core/color.cpp
+++ b/core/color.cpp
@@ -508,13 +508,6 @@ Color Color::from_hsv(float p_h, float p_s, float p_v, float p_a) const {
 	return Color(m + r, m + g, m + b, p_a);
 }
 
-// FIXME: Remove once Godot 3.1 has been released
-float Color::gray() const {
-
-	WARN_DEPRECATED_MSG("'Color.gray()' is deprecated and will be removed in a future version. Use 'Color.v' for a better grayscale approximation.");
-	return (r + g + b) / 3.0;
-}
-
 Color::operator String() const {
 
 	return rtos(r) + ", " + rtos(g) + ", " + rtos(b) + ", " + rtos(a);
diff --git a/core/color.h b/core/color.h
index 75a2b07d71b..a7ab94ab08c 100644
--- a/core/color.h
+++ b/core/color.h
@@ -56,7 +56,6 @@ struct Color {
 	uint64_t to_rgba64() const;
 	uint64_t to_argb64() const;
 	uint64_t to_abgr64() const;
-	float gray() const;
 	float get_h() const;
 	float get_s() const;
 	float get_v() const;
diff --git a/core/image.cpp b/core/image.cpp
index b126437fa9c..d9f84621a35 100644
--- a/core/image.cpp
+++ b/core/image.cpp
@@ -1715,7 +1715,7 @@ Error Image::generate_mipmap_roughness(RoughnessChannel p_roughness_channel, con
 						roughness = c.b;
 					} break;
 					case ROUGHNESS_CHANNEL_L: {
-						roughness = c.gray();
+						roughness = c.get_v();
 					} break;
 					case ROUGHNESS_CHANNEL_A: {
 						roughness = c.a;
diff --git a/core/variant_call.cpp b/core/variant_call.cpp
index 6b5b9471858..f088705cdd4 100644
--- a/core/variant_call.cpp
+++ b/core/variant_call.cpp
@@ -488,7 +488,6 @@ struct _VariantCall {
 	VCALL_LOCALMEM0R(Color, to_argb64);
 	VCALL_LOCALMEM0R(Color, to_abgr64);
 	VCALL_LOCALMEM0R(Color, to_rgba64);
-	VCALL_LOCALMEM0R(Color, gray);
 	VCALL_LOCALMEM0R(Color, inverted);
 	VCALL_LOCALMEM0R(Color, contrasted);
 	VCALL_LOCALMEM2R(Color, linear_interpolate);
@@ -1737,7 +1736,6 @@ void register_variant_methods() {
 	ADDFUNC0R(COLOR, INT, Color, to_argb64, varray());
 	ADDFUNC0R(COLOR, INT, Color, to_abgr64, varray());
 	ADDFUNC0R(COLOR, INT, Color, to_rgba64, varray());
-	ADDFUNC0R(COLOR, REAL, Color, gray, varray());
 	ADDFUNC0R(COLOR, COLOR, Color, inverted, varray());
 	ADDFUNC0R(COLOR, COLOR, Color, contrasted, varray());
 	ADDFUNC2R(COLOR, COLOR, Color, linear_interpolate, COLOR, "b", REAL, "t", varray());
diff --git a/doc/classes/Color.xml b/doc/classes/Color.xml
index 0d3f51309bc..5529251b5ab 100644
--- a/doc/classes/Color.xml
+++ b/doc/classes/Color.xml
@@ -128,18 +128,6 @@
 				[/codeblock]
 			</description>
 		</method>
-		<method name="gray">
-			<return type="float">
-			</return>
-			<description>
-				Returns the color's grayscale representation.
-				The gray value is calculated as [code](r + g + b) / 3[/code].
-				[codeblock]
-				var c = Color(0.2, 0.45, 0.82)
-				var gray = c.gray() # A value of 0.466667
-				[/codeblock]
-			</description>
-		</method>
 		<method name="inverted">
 			<return type="Color">
 			</return>
diff --git a/modules/gdnative/gdnative/color.cpp b/modules/gdnative/gdnative/color.cpp
index 24587ce4a14..914d5b03f48 100644
--- a/modules/gdnative/gdnative/color.cpp
+++ b/modules/gdnative/gdnative/color.cpp
@@ -141,11 +141,6 @@ godot_int GDAPI godot_color_to_argb32(const godot_color *p_self) {
 	return self->to_argb32();
 }
 
-godot_real GDAPI godot_color_gray(const godot_color *p_self) {
-	const Color *self = (const Color *)p_self;
-	return self->gray();
-}
-
 godot_color GDAPI godot_color_inverted(const godot_color *p_self) {
 	godot_color dest;
 	const Color *self = (const Color *)p_self;
diff --git a/modules/gdnative/gdnative_api.json b/modules/gdnative/gdnative_api.json
index 8ccb8d2286c..c2cbe1e8246 100644
--- a/modules/gdnative/gdnative_api.json
+++ b/modules/gdnative/gdnative_api.json
@@ -578,13 +578,6 @@
           ["const godot_color *", "p_self"]
         ]
       },
-      {
-        "name": "godot_color_gray",
-        "return_type": "godot_real",
-        "arguments": [
-          ["const godot_color *", "p_self"]
-        ]
-      },
       {
         "name": "godot_color_inverted",
         "return_type": "godot_color",
diff --git a/modules/gdnative/include/gdnative/color.h b/modules/gdnative/include/gdnative/color.h
index 3f046b7f08a..47c01dbb209 100644
--- a/modules/gdnative/include/gdnative/color.h
+++ b/modules/gdnative/include/gdnative/color.h
@@ -91,8 +91,6 @@ godot_int GDAPI godot_color_to_rgba64(const godot_color *p_self);
 
 godot_int GDAPI godot_color_to_argb32(const godot_color *p_self);
 
-godot_real GDAPI godot_color_gray(const godot_color *p_self);
-
 godot_color GDAPI godot_color_inverted(const godot_color *p_self);
 
 godot_color GDAPI godot_color_contrasted(const godot_color *p_self);