I have a low-res bitmap. It has a dark grey background with a plain white icon. The transitional pixels are various shades of grey.

I want to make the dark grey into a bright blue, leave the white white, and have the transitional pixels changed to maintain their respective "in between" values.

I do have Photoshop CS2 but I though Xara was more likely to be able to do this. Can anyone help?

Thanks