Harmonize background color in favicon fallback

app/src/main/java/org/koitharu/kotatsu/utils/image/FaviconFallbackDrawable.kt

@@ -4,6 +4,9 @@ import android.content.Context
 import android.graphics.*
 import android.graphics.drawable.Drawable
 import androidx.core.graphics.ColorUtils
+import com.google.android.material.color.MaterialColors
+import org.koitharu.kotatsu.R
+import org.koitharu.kotatsu.utils.ext.getThemeColor
 import kotlin.math.absoluteValue
 
 class FaviconFallbackDrawable(
@@ -13,7 +16,7 @@ class FaviconFallbackDrawable(
 
 	private val paint = Paint(Paint.ANTI_ALIAS_FLAG)
 	private val letter = name.take(1).uppercase()
-	private val color = colorOfString(name)
+	private val color = MaterialColors.harmonize(colorOfString(name), context.getThemeColor(android.R.attr.colorPrimary))
 	private val textBounds = Rect()
 	private val tempRect = Rect()