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I'm trying to colorize a layer with the HSV/HSL Adjustment filter shown below:

Getting started with Krita - HSV/HSL Adjustment

However, I noticed that the colorization would likely work only on fully opaque parts. I tried to colorize a tree, but some leaves won't:

Bad leave colorization

Is there an explanation about this phenomenon?


Note: the first picture came from Getting started with Krita (2/3) by David Revoy - CC BY 4.0

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    I think it could be possible the color is black or dark enough that you can't see a difference. I haven't used Krita, but I would assume it works the same as in Photoshop. You can't colorize black or white, even if it's translucent. So if I'm not totally wrong, you need to probably increase Lightness (move it to the right) a little bit to see the color change. And to not ruin anything, you might have to select the problem section before doing this so you don't make other parts too light (or not). – Joonas Feb 18 at 8:22
  • Maybe "Colorize not working on dark translucent color in Krita" or maybe "Why is colorize not working in Krita". I think it's probably fine is the title is a bit vague in this case. There aren't that many reasons for it not to work. I think the title, as it is now is fine too... – Joonas Feb 18 at 10:33
  • Well then... You super sure? Like no matter how much you add lightness, it won't get colorized? What if you merge the translucent image to a white background? Would the color change then? – Joonas Feb 18 at 20:56
  • I think you should post the answer yourself. It'll be some hours before the site let's you accept it, but you will be able to make a better answer since you know better what worked for you. – Joonas Feb 19 at 6:01
  • No, it's fine. You know more about it now than I do. Go for it. – Joonas Feb 19 at 7:54
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Thanks to Joonas' help (and from a nice user in the Krita official IRC channel), I realized those areas were actually fully black. It wasn't noticeable since a transparent black pixel could look like a lighter one.

One approach to solve that was to set a background layer fitting the tree shape through a transparency mask.

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