Comment 4 for bug 228149

Thank you for taking the time to report this bug and help make Ubuntu better. I have re-assigned this from update-manager to gnome-icon-theme, as that is the package which contains the default update-notifier icons for the Ubuntu Human theme. However, as already pointed out, from the GNOME Human Interface Guidelines:

"However, color should always be regarded as a useful addition to your design, not as a necessity. Never depend upon colors alone to display important information, and keep in mind that if colors cannot be perceived correctly (for example, the user has an 8-bit system, or is color-blind), your application should still be usable."

Therefore, I'm closing this bug as Invalid. Feel free to report any further bugs you might find.

Thanks