diff --git a/runelite-api/src/main/java/net/runelite/api/hooks/DrawCallbacks.java b/runelite-api/src/main/java/net/runelite/api/hooks/DrawCallbacks.java
index 989cc45dd2..7cf7469f37 100644
--- a/runelite-api/src/main/java/net/runelite/api/hooks/DrawCallbacks.java
+++ b/runelite-api/src/main/java/net/runelite/api/hooks/DrawCallbacks.java
@@ -43,7 +43,12 @@ public interface DrawCallbacks
 						SceneTileModel model, int tileZ, int tileX, int tileY,
 						int zoom, int centerX, int centerY);
 
-	void draw();
+	/**
+	 * Called when a frame should be drawn.
+	 *
+	 * @param overlayColor Color of full-viewport overlays, if any
+	 */
+	void draw(int overlayColor);
 
 	boolean drawFace(Model model, int face);
 
diff --git a/runelite-client/src/main/java/net/runelite/client/plugins/gpu/GpuPlugin.java b/runelite-client/src/main/java/net/runelite/client/plugins/gpu/GpuPlugin.java
index 2d3b0c78d4..e82373edd5 100644
--- a/runelite-client/src/main/java/net/runelite/client/plugins/gpu/GpuPlugin.java
+++ b/runelite-client/src/main/java/net/runelite/client/plugins/gpu/GpuPlugin.java
@@ -264,6 +264,7 @@ public class GpuPlugin extends Plugin implements DrawCallbacks
 	private int uniTexSamplingMode;
 	private int uniTexSourceDimensions;
 	private int uniTexTargetDimensions;
+	private int uniUiAlphaOverlay;
 	private int uniTextures;
 	private int uniTextureOffsets;
 	private int uniBlockSmall;
@@ -545,6 +546,7 @@ public class GpuPlugin extends Plugin implements DrawCallbacks
 		uniTexTargetDimensions = gl.glGetUniformLocation(glUiProgram, "targetDimensions");
 		uniTexSourceDimensions = gl.glGetUniformLocation(glUiProgram, "sourceDimensions");
 		uniUiColorBlindMode = gl.glGetUniformLocation(glUiProgram, "colorBlindMode");
+		uniUiAlphaOverlay = gl.glGetUniformLocation(glUiProgram, "alphaOverlay");
 		uniTextures = gl.glGetUniformLocation(glProgram, "textures");
 		uniTextureOffsets = gl.glGetUniformLocation(glProgram, "textureOffsets");
 
@@ -855,9 +857,9 @@ public class GpuPlugin extends Plugin implements DrawCallbacks
 	}
 
 	@Override
-	public void draw()
+	public void draw(int overlayColor)
 	{
-		invokeOnMainThread(this::drawFrame);
+		invokeOnMainThread(() -> drawFrame(overlayColor));
 	}
 
 	private void resize(int canvasWidth, int canvasHeight, int viewportWidth, int viewportHeight)
@@ -883,7 +885,7 @@ public class GpuPlugin extends Plugin implements DrawCallbacks
 		}
 	}
 
-	private void drawFrame()
+	private void drawFrame(int overlayColor)
 	{
 		if (jawtWindow.getAWTComponent() != client.getCanvas())
 		{
@@ -1208,7 +1210,7 @@ public class GpuPlugin extends Plugin implements DrawCallbacks
 		tempUvOffset = 0;
 
 		// Texture on UI
-		drawUi(canvasHeight, canvasWidth);
+		drawUi(overlayColor, canvasHeight, canvasWidth);
 
 		glDrawable.swapBuffers();
 
@@ -1226,7 +1228,7 @@ public class GpuPlugin extends Plugin implements DrawCallbacks
 		};
 	}
 
-	private void drawUi(final int canvasHeight, final int canvasWidth)
+	private void drawUi(final int overlayColor, final int canvasHeight, final int canvasWidth)
 	{
 		final BufferProvider bufferProvider = client.getBufferProvider();
 		final int[] pixels = bufferProvider.getPixels();
@@ -1254,6 +1256,12 @@ public class GpuPlugin extends Plugin implements DrawCallbacks
 		gl.glUniform1i(uniTexSamplingMode, uiScalingMode.getMode());
 		gl.glUniform2i(uniTexSourceDimensions, canvasWidth, canvasHeight);
 		gl.glUniform1i(uniUiColorBlindMode, config.colorBlindMode().ordinal());
+		gl.glUniform4f(uniUiAlphaOverlay,
+			(overlayColor >> 16 & 0xFF) / 255f,
+			(overlayColor >> 8 & 0xFF) / 255f,
+			(overlayColor & 0xFF) / 255f,
+			(overlayColor >>> 24) / 255f
+		);
 
 		if (client.isStretchedEnabled())
 		{
diff --git a/runelite-client/src/main/resources/net/runelite/client/plugins/gpu/fragui.glsl b/runelite-client/src/main/resources/net/runelite/client/plugins/gpu/fragui.glsl
index e522d34400..5a54522f83 100644
--- a/runelite-client/src/main/resources/net/runelite/client/plugins/gpu/fragui.glsl
+++ b/runelite-client/src/main/resources/net/runelite/client/plugins/gpu/fragui.glsl
@@ -34,6 +34,7 @@ uniform int samplingMode;
 uniform ivec2 sourceDimensions;
 uniform ivec2 targetDimensions;
 uniform int colorBlindMode;
+uniform vec4 alphaOverlay;
 
 #include scale/bicubic.glsl
 #include scale/xbr_lv2_frag.glsl
@@ -44,6 +45,13 @@ in XBRTable xbrTable;
 
 out vec4 FragColor;
 
+vec4 alphaBlend(vec4 src, vec4 dst) {
+    return vec4(
+        src.rgb + dst.rgb * (1.0f - src.a),
+        src.a + dst.a * (1.0f - src.a)
+    );
+}
+
 void main() {
     vec4 c;
 
@@ -51,14 +59,17 @@ void main() {
         case SAMPLING_CATROM:
         case SAMPLING_MITCHELL:
             c = textureCubic(tex, TexCoord, samplingMode);
+            c = alphaBlend(c, alphaOverlay);
             c.rgb = colorblind(colorBlindMode, c.rgb);
             break;
         case SAMPLING_XBR:
             c = textureXBR(tex, TexCoord, xbrTable, ceil(1.0 * targetDimensions.x / sourceDimensions.x));
+            c = alphaBlend(c, alphaOverlay);
             c.rgb = colorblind(colorBlindMode, c.rgb);
             break;
         default: // NEAREST or LINEAR, which uses GL_TEXTURE_MIN_FILTER/GL_TEXTURE_MAG_FILTER to affect sampling
             c = texture(tex, TexCoord);
+            c = alphaBlend(c, alphaOverlay);
             c.rgb = colorblind(colorBlindMode, c.rgb);
     }