Improve contrast of white virtual-signal icons

[dmke]

TL;DR

The contrast of white virtual-signal icons on active selections and input fields could be improved.

What?

Currently, the white signal icons, like [virtual-signal=left-arrow] have poor readability when used in (active) text input fields, or when they're shown on active lists.

There are basically two options to address this:

1. Invert the color of the icon. This is similar to the text display, which changes the text color from white to black.
2. Add a drop shadow or outline. This is similar to how the Select Icon picker displays the icons.

Here's an image which shows the issue on the top left, mockups for (a) and (b) on the bottom right, and a cropped screenshot of the Select Icon picker on the top right.

factorio-white-signal-icons.png (1.13 MiB) Viewed 86 times

Why?

I would like to use these icons as mnemonic for space platforms. While this isn't limited to this use case, it eliminates guesswork.

[nethus]

Yes please. Another place where the white rich text icons are nearly invisible is in the train schedule, when used as a station name for the current destination.