Problem in Burn Tool

Hello,

If i burn a background color such as Bule, its naturally going to black.
But i want to do it yello or whte.

pls tell me how i do this?

Use the dodge tool to 'bleach' a colour lighter or to white. Dunno about yellow though!

Try this way of burning/dodging.
open new layer and change blen mode to soft light.
B for brush and change opacity to 30% click D to reset swatches.
Burn ith black and dodge with white.
As for your need to use yellow click on a swatch and change to yellow.
Using this technique you can go back and undo.
Also no pixel were harm because you are a layer.
By sneaking up on the effect with 30% you build up tones versus throwing them down. Hope this helps
PS short cut for the new layer with soft light
Hold alt/option and click new layer in layers palette once there choose soft light and you are good to go. Peace