Colors

[Hans Knudsen]

Hello
I am aware that the following may not be exactly an Excel question, but none the less I hope someone will explain. Why is it that in
Excel's Colors dialog box (Custom) one can mix red, green and blue and not the primary colors red, blue and yellow?. Guess I should
know, but I don't.

Hans Knudsen

 

[cincode5]

I believe the answer is related to the way a monitor produces color on the pixel level. The primary colors for each pixel are Red, Blue, and Green, (known as RBG). Primary colors generally relate to the way offset presses work using the 3 primary colors overlaping each other, plus one extra color.
Regards...

 

[Harlan Grove]

I am aware that the following may not be exactly an Excel question, but none
the less I hope someone will explain. Why is it that in Excel's Colors dialog
box (Custom) one can mix red, green and blue and not the primary colors red,
blue and yellow?. Guess I should know, but I don't.

Primary colors are artistic concepts, and they generally apply to pigments,
which reflect light. Light sources, on the other hand, are more the domain of
physics, and RGB are the basic colors.

With pigments, mix red, blue and yellow and you get brown. With light sources,
mix red, green and blue and you get white. Your monitor is a light source, so it
uses the physics rather than artistic convention.

 

[Mark E. Philpot]

Hi,
If you are interested in mixing colors, try my Color
Systems Managemnet Utility at:
http://au.geocities.com/windsofmark

It's not excel but you can move the scrollers of R,G,B to
find a new color.

It also shows html and decimal factors. A picture on the
site shows what it looks like. There are others there too.

regards
Mark E. Philpot

-----Original Message-----
Hello
I am aware that the following may not be exactly an Excel

question, but none the less I hope someone will explain.
Why is it that in

Excel's Colors dialog box (Custom) one can mix red, green

and blue and not the primary colors red, blue and yellow?.
Guess I should