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Convert opacity value to grayscale luminosity
#4
(08-07-2023, 06:36 PM)Purple_ghoost Wrote:
(08-06-2023, 10:40 PM)Ofnuts Wrote:
(08-06-2023, 08:46 PM)Purple_ghoost Wrote: question

Already answered on GDSE. Big Grin

Thank you for your answer.

However, I am confused as opacity in Gimp does not correspond to what I expected. 

In Photoshop, when you change "opacity", it does not change the tint whereas in Gimp, the tint changes. 

Here is an example: hslpicker.com/#005ed1,0.69/#fff 
The color I used is RGB(0, 94, 209) or TSL(59, 100, 41). When used in Photoshop with an opacity set to 69% on a white background, the result I get is RGB (79, 144, 223) or TSL(59, 69, 59) as in the hlspicker example above. In Gimp, I get RGB (151, 167, 225) or TSL(63, 55, 74). 

What did I get wrong?

New comment on GDSE. Actually a "default" v.s "legacy" blend mode quirk (see screenshot on GDSE).
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Messages In This Thread
RE: Convert opacity value to grayscale luminosity - by Ofnuts - 08-07-2023, 09:43 PM

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