Web color is still broken
The worst part about web colour is that it's not even consistent. If you draw a PNG containing a rectangle with a given colour on to a page with background colour of the <i>exact same</i> RGB values, then it can look different.<p>Here's an example: <a href="https://incoherency.co.uk/interest/colour.html" rel="nofollow">https://incoherency.co.uk/interest/colour.html</a><p>And here's a screenshot of how it looks on my browser (Firefox 99.0, Ubuntu 20.04 LTS): <a href="https://img.incoherency.co.uk/3812" rel="nofollow">https://img.incoherency.co.uk/3812</a><p>The square is a different colour to the page background colour despite having the same RGB value (#0cf4c7) but they look different. No amount of changing the colour mode selection in GIMP can fix this.<p>I opened the screenshot in GIMP and used the colour picker tool to see what colour my #0cf4c7 has turned into, and in the screenshot image it is #67f1c7.<p>Strangely, when I draw the <i>screenshot</i> in the browser, its colours stay the same, so obviously there is something you can do to the PNG that will make it render the colours you chose.