Created attachment 314447 [details]
screenshot

Wow, it's not a real icon, but drawn by cairo... interesting approach; I guess it would work if we can figure out how to get the right colors from the theme.

Nautilus 3.18.1 has a nice progress icon (in the form of a round timer) that has the same problem too.

Created attachment 315003 [details]
nautilus black on black too

Nautilus was already fixed in bug #756803. I'll just copy what they did....

Created attachment 315066 [details] [review]
ephy-download-progress-icon: Use theme colors

Based on the corresponding nautilus fix by Elias Aebi.

Review of attachment 315066 [details] [review]:

::: lib/widgets/ephy-downloads-progress-icon.c
@@ +56,3 @@
+  style_context = gtk_widget_get_style_context (widget);
+  gtk_style_context_get_color (style_context, gtk_widget_get_state_flags (widget), &color);
+  color.alpha = progress == 1 ? 1 : 0.2;

you should probably multiply the alpha by 0.2 instead of overriding it in case the theme color uses an alpha value

@@ +72,3 @@
     cairo_clip (cr);
 
+    color.alpha = 0.7;

here as well

Thanks for the review! I'll change that to multiplication.

Created attachment 315973 [details] [review]
ephy-download-progress-icon: Use theme colors

Based on the corresponding nautilus fix by Elias Aebi.

Ping Carlos

Attachment 315973 [details] pushed as 15b634b - ephy-download-progress-icon: Use theme colors