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Want a quick way to test how your apps and web sites look to people with various types of colour blindness?
The Colorblind Filters GNOME extension makes it trivial to do so:
https://extensions.gnome.org/extension/5589/colorblind-filters/
(she/her) @aral I typically warn folks that how it looks to people who aren't colorblind isn't the same as how it looks to people who are. People born colorblind learn to compensate before they can be tested.
Why? Because we start teaching kids colors when they're little & they can't be tested for colorblindness until they can talk. (This might have changed...someone was working on a test for 2yos at one point.)
So while it looks awful to us, it doesn't to them.
It is good for checking contrast ratios.
@aral I use a tool that I have to remember to generate a palette before any design.
I include that in the design guide of the software I develop and then is saved as documentation of it for future developers.
@aral You don't even necessarily need an extension for this since Firefox has it built into the accessibility tools.
Though the extension you linked appears to offer more options.
@julian Nice. (And yeah, the extension affects everything on your screen.)
@frigidcode Me too :)
@aral I think around 8% of males are color blind, therefore many people reading this post will be (me included). Lots of people don't know that they're colorblind. Colorblindness is not all-or-none, but gradual, and for many it's so mild that they never find out. For me it was by coincidence when I was 11 and needed prescription glasses.
There are many free online tests available if you're curious.
@aral Only when you're using Gnome though.
This. Is. KDE!