LR and JPG export - Huge colour difference

Hello guys and girls,

I went to export a photo from LR 3 into a small JPG to email around, and I noticed the colours were off compared to what I saw in LR.

See below (LR on the left):

IMAGE IS A REDIRECT OR MISSING! HTTP response: 404 | MIME changed to 'text/html' | Byte size: ZERO

That's the problem. Any image that is viewed in a viewer or a browser that is not color-managed will look "off" (darker, flatter and less saturated) if it is not in sRGB space.

To my eyes those two pics look identical/

Looks identical to me on a Macbook Pro with a color managed browser. How are you viewing the files on your end?
Are you saving the profile embedded in the JPEG?

Just set LR3 to export in sRGB. Keep your originals in prophoto but jpgs should be in sRGB since 85% of the public have no clue about color management and 14% of the remainder get it wrong anyway (I count myself in the 14%.)

5Dmaniac wrote in post #13874833
To my eyes those two pics look identical/

Agree, or at least: Very, very close.

The viewer you are using might convert to your monitor profile a tiny bit different then LR, so that might cause a tiny difference, but I'm surprised you notice it.

On a side note: As Elie says, sRGB is probably a (much) better choice if you are going to "email around" the image.