Having iCab set as my default browser, I have changed the toolbar icons to a more simplified look. This set is now updated to include the change in Add to Bookmark icon when the site is already bookmarked – it now turns green – see screen-shot below.
These replace the Yellow Cab set, as selected in Preferences > General > Windows tab and at the bottom Colour scheme for browser toolbar icons: Yellow icons (Yellow Cab).
When using the Grey toolbar icons setting – it will look like this:

Click on the zip logo to download and when opened, copy the contents of the Resource Milo folder into the Resources folder of iCab. (Open the iCab application with a right-click – Show Package Contents and navigate to the Resources folder.)