dark colors dont work properly

I have tried various blend modifications to no avail....

If you use a darker color in GLPaint sample this happens, link to image attached:

http://www.studionu.nu/files/GLPaint_dark_color.png

As you can see , the "M" stands out even after painting over the image.

Does anybody have a clue as to what is going on here and how to fix it?

Thanks

I am using glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA); (premultiplied)

and I tried glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);

EDIT: here is the file based on GLPaint for simplicity sake.

I have an example of the code which is a problem in a copy of GLPaint, apples basic drawing app. Here is the link..... Maybe you could look at it. I have overidden the color change function so that it starts with red and changes to dark red when you select any of the colors.....

http://www.studionu.net/files/GLPaint.zip

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It's likely because of the blending mode selected, i can't remember the specifics, but it looks like your using multiply style of blending, where brighter colours shine through darker ones.

Choose a different Blending method so that the new colour is the newly applied colour, not a combination of two colours

Edit:

OpenGL Blending Options:

http://pyopengl.sourceforge.net/documentation/manual/glBlendFunc.3G.html

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