Adjust compose text color luminance

app/src/main/java/eu/faircode/email/FragmentCompose.java

@@ -355,6 +355,9 @@ public class FragmentCompose extends FragmentBase {
         lt_enabled = LanguageTool.isEnabled(context);
         lt_auto = LanguageTool.isAuto(context);
 
+        if (compose_color != Color.TRANSPARENT && Helper.isDarkTheme(context))
+            compose_color = HtmlHelper.adjustLuminance(compose_color, true, HtmlHelper.MIN_LUMINANCE_COMPOSE);
+
         setTitle(R.string.page_compose);
         setSubtitle(getResources().getQuantityString(R.plurals.page_message, 1));
     }

app/src/main/java/eu/faircode/email/HtmlHelper.java

@@ -141,12 +141,13 @@ public class HtmlHelper {
     static final int MAX_SHARE_TEXT_SIZE = 50 * 1024; // characters
     static final int MAX_TRANSLATABLE_TEXT_SIZE = 50 * 1024; // characters
 
+    static final float MIN_LUMINANCE_VIEW = 0.7f;
+    static final float MIN_LUMINANCE_COMPOSE = 0.85f;
+
     private static final int DEFAULT_FONT_SIZE = 16; // pixels
     private static final int DEFAULT_FONT_SIZE_PT = 12; // points
     private static final int GRAY_THRESHOLD = Math.round(255 * 0.2f);
     private static final int COLOR_THRESHOLD = Math.round(255 * 0.1f);
-    private static final float MIN_LUMINANCE_VIEW = 0.7f;
-    private static final float MIN_LUMINANCE_COMPOSE = 0.85f;
     private static final int TAB_SIZE = 4;
     private static final int MAX_ALT = 250;
     private static final int MAX_AUTO_LINK = 250;