This question is a public service in response to the thread on low volume recently on this list. :)

I did a color print of a real estate page for a client. "Magnificent," he said, "but next time perhaps you can make these two green gradients the same color?"

Sure enough. One of the gradients (both range from a grass green to white) was bluish and the other was yellowish. Not hugely so but distinctly noticeable.

So I set about to find out why. I couldn't. They used the same swatch color. But they looked different, even on screen. There were differing elements on top of the gradients. So I fiddled with those to see if they could cause a difference. Nope.

Then I had what I thought was an unrelated impulse. For tidiness, I decided to remove a superfluous white tab stop from the yellowish gradient. There had been two white stops to get the proper spacing earlier when the gradient included another color. Two stops so close together that they overlapped.

Bingo. The yellowish coloration disappeared. The two gradients looked and printed the same. Why would that happen?

(I believe firmly that the removed stop was pure white; and even if it wasn't, the yellowish aspect wasn't just at its end of the gradient; it was throughout.)

(Removing the white tab stop extended the gradient by perhaps 2%.)

Chuck M


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