I am using GIMP and my images are appearing darker in an app I'm using, specifically OOTP 18. For example, my blue #0054a4 displays as a darker blue #003184, when I need it to appear as blue #004295 to match the blue in the game. There is a consistent pattern happening for all colors, but I don't know what exactly I need to manipulate on GIMP. Here is an example of what's happening to my colors from lightest to darkest:
RED: png file color #CE1041 --> file stores as #C40930 --> display result #B90421
BROWN: #965C0E --> #854907 --> #733703
BLUE: #0054A4 --> #004295 --> #003184
I need to figure out what I need to manipulate, or what is a common pattern between these colors to have the next lightest set of colors to match the other similar images in the game. The built-in images in the game are proprietary, and therefore can't be viewed or opened. I only use GIMP and Mac Preview, unless anyone can recommend another free editor that will do the trick.