Colour in screenshots are washed out and low contrast

[hemebond]

Here is a screenshot taken in-game with F12:

And here is a screenshot taken of the game window:

[bones-was-here]

When I take screenshots they look the same as ingame, have you got scr_screenshot_gammaboost cranked up or something?

[hemebond]

It doesn't look like I've changed any of the screenshot settings:

8 possible variables: 
scr_screenshot_alpha is "0" ["0"] try to write an alpha channel to screenshots (debugging feature)
scr_screenshot_gammaboost is "1" ["1"] gamma correction on saved screenshots and videos, 1.0 saves unmodified images
scr_screenshot_jpeg is "1" ["1"] save jpeg instead of targa
scr_screenshot_jpeg_quality is "0.9" ["0.9"] image quality of saved jpeg
scr_screenshot_name is "dp" ["dp"] prefix name for saved screenshots (changes based on -game commandline, as well as which game mode is running; the date is encoded using strftime escapes)
scr_screenshot_name_in_mapdir is "0" ["0"] if set to 1, screenshots are placed in a subdirectory named like the map they are from
scr_screenshot_png is "0" ["0"] save png instead of targa
scr_screenshot_timestamp is "1" ["1"] use a timestamp based number of the type YYYYMMDDHHMMSSsss instead of sequential numbering