Automatically set issue label title color based on background color

app/src/main/java/com/commit451/gitlab/extension/Label.kt

@@ -2,6 +2,7 @@ package com.commit451.gitlab.extension
 import android.graphics.Color
 import android.support.annotation.ColorInt
+import com.commit451.easel.Easel
 import com.commit451.gitlab.model.api.Label
 import com.commit451.gitlab.util.ColorUtil
@@ -16,5 +17,8 @@ fun Label.getColor(): Int {
 @ColorInt
 fun Label.getTitleColor(): Int {
-    return ColorUtil.getTitleColor(getColor())
+    if (Easel.isColorDark(getColor())) {
+        return Color.WHITE
+    }
+    return Easel.darkerColor(getColor(), 0.25f)
 }
\ No newline at end of file

app/src/main/java/com/commit451/gitlab/util/ColorUtil.kt

 package com.commit451.gitlab.util
-import android.graphics.Color
 import android.support.annotation.ColorInt
 /**
@@ -11,18 +10,4 @@ object ColorUtil {
     fun convertColorIntToString(@ColorInt color: Int): String {
         return String.format("#%06X", 0xFFFFFF and color)
     }
-
-    fun getTitleColor(@ColorInt color: Int): Int {
-        val darkness = 1.0 - (0.299 * Color.red(color).toDouble() +
-                0.587 * Color.green(color).toDouble() +
-                0.114 * Color.blue(color).toDouble()) / 255.0
-
-        if (darkness < 0.35) {
-            val hsv = FloatArray(3)
-            Color.colorToHSV(color, hsv)
-            hsv[2] *= 0.25f
-            return Color.HSVToColor(hsv)
-        }
-        return Color.WHITE;
-    }
 }