Let's try this tutorial thing, shall we?
Going from
to
(Jim and Pam from The Office 3x01- Gay Witch Hunt)
Made in GIMP, but can be used anywhere
1. Crop, sharpen, and all that jazz
2. Duplicate and set to screen. No, I am not crazy- I realize this picture is ridiculously dark. I usually just wait until the end to fix it up
3. Take a colour such as 0b2144 and make a new layer- set it to exclusion at 80% (or, if you're in GIMP, difference at 80% and then screen at 80%)
4. Take a light blue such as 87c0e7 and make a new layer- set it to softlight at 100%
5. Copy all the visible layers (just edit->copy visible in GIMP) and paste it as a new layer. Set to burn at 100%
6. Go back and delete that softlight layer
7. Now, go back and start duplicating that screen layer. Since my picture is so freaking dark, it needed 12
Yay! Boring and not nearly fabulous, but I'm so very bored...