Apparently this hasn't been requested before (or I didn't search for the correct terms).
In the Colours screen of the Garage, it would be very handy to have a color picker (à la Photoshop). Here's how I'd expect it to work:
1. Click on a colour box (the rounded rectangle, next to the sliders, that actually shows the defined colour): the cursor changes into a pipette.
2. Click with the pipette anywhere in the screen (most probably on the car's skin): the cursor changes back into the regular cursor, and the colour you selected is applied to the color box you clicked in step 1 (whose sliders are then updated).
In the Colours screen of the Garage, it would be very handy to have a color picker (à la Photoshop). Here's how I'd expect it to work:
1. Click on a colour box (the rounded rectangle, next to the sliders, that actually shows the defined colour): the cursor changes into a pipette.
2. Click with the pipette anywhere in the screen (most probably on the car's skin): the cursor changes back into the regular cursor, and the colour you selected is applied to the color box you clicked in step 1 (whose sliders are then updated).