JPEG kinda light. What gives???

[MEMPER]

So I do a painting and it looks good on my monitor. Its been balanced through the mac monitor calibration and in PS I've got my colors set to U.S. Prepress Default. When I upload my jpeg to the web its all washed out. On screen its okay.
I dont get it.
any help?:nohope:

[Snarfevs]

U.S. Prepress Default

That's your problem right there.

Hit shift-ctrl-k or shift-cmd-k. Change your working space to 'General Purpose' or 'Monitor Colour' and ensure your working gamma and monitor gamma match. Ensure that proof colours are turned off.

Incidentally, you could have easily discovered this via a search.

[MEMPER]

ok. but I see someone else advising that I should choose sRGB

[Snarfevs]

This is correct. Your RGB space for general purpose and monitor colour should automatically be sRGB. Here I have sRGB IEC61966-2.1 selected, which is identical to the colour space of my monitor. This means that photoshop is displaying colours in the same way as the OS is.

[Elwell]

Standard PC (and sRGB) gamma is 2.2, standard mac gamma is 1.8. Sounds like Photoshop is set up using 2.2, which is darker, and the rest of your system, including your browser, is using 1.8, hence the difference.