How to use- "color to alpha" in GIMP when it is grayed out?
42298
GIMP "color to alpha" is not selectable
64347
FFmpeg: Convert transparency to a certain color
40461
Rendered image is just grey
14622
Can I color text by using an image, so that the color isn't flat?
81293
Script to remove Yellow(or any color) from layers panel?
133654
\selectcolormodel{gray} doesn't always work with tikzducks
11820
How to copy a layer between images or canvas in gimp 2.8?
50727
How can I change colors in an Illustrator file without modifying other aspects?
129154
Transparent bitmaps or graphics in gui objects initially appear wrong
143811
Is there a way to convert an image to grayscale?
114033
Convert a Bitmap to GrayScale in Android
17921
How to convert the background color of image to match the color of Pygame window?
51777
With Photoshop, how to batch replace white background with transparent in the image
29127
Alpha channel in colortbl
103067
How to make one color transparent on a UIImage?
92137
Can I make color data not render as gradient?
65013
Detect gray things with OpenCV