I have an image that is made up of three long narrow strips of colour that close to a point at one end. Those three strips are flipped and the points placed end to end so it's like a ribbon with one twist in it but in a straight line.
If I save for web as a .png the colors bleed into each other. It's only 12px high with each strip being 4px. If I turn off anti-alias the bleeding stops but the points of the ribbon look bad.
I am not sure what to do about that.
Probably nothing. This sounds perfectly normal. The only way to possibly avoid it would IMO be to construct each strip as a separate layer in PS, then apply selective color corrections near the tip to improve the perceived color blending...
Perhas two separat png's one for each side of the art placed one butted against each other with a transparent background or the same background color.