Calculating harmonised colours

[Bill Marriott]

Eric,

I hope you don't mind if I reproduce here some links I shared on another 
newsgroup (comp.databases.filemaker) for determining complementary colors. 
In some cases, it can be quite educational to review the JavaScript code for 
these pages.

I think that as a general approach, you probably want to convert to HSL, 
figure out your colors, then convert back to RGB.

Formulas for this can be found at:

http://www.easyrgb.com/math.php?MATH=M19#text19

Here are links to other color calculators:
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http://www.colormatch.dk/
http://meddle.dzygn.com/tests/colors/

A very easy, elegant, visual tool that returns six complementary colors. The
first link is the original gem, the second one provides RGB values and
precise color entry.

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http://wellstyled.com/tools/colorscheme2/index-en.html

Offers five different styles of color matching

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http://www.december.com/html/spec/colorschemer.html

Offers six different styles of matching, plus a nice preview of a formatted
page using the colors. (Requires the free Adobe SVG viewer plug-in from
http://www.adobe.com/svg/viewer/install/main.html)

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http://www.webwhirlers.com/colors/colorwizard.asp

Offers seven different matches of color (but requires entry of hex values)

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http://www.hypergurl.com/colormatch.php

Another color mixer that supplies nine compatible colors. (Try clicking on
the "Load predefined theme" popup menu and using the scroll wheel on your
mouse.)

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http://colorblender.com/

A very easy to use blender that will also suggest PANTONE(R) colors.

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For an in-depth look at the theory behind color schemes, and why you might
want to use one style of color matching over another, check out:

http://www.december.com/html/spec/colorhslhexuse.html

Bill

"Eric Chatonet" 
<eric.chatonet at sosmartsoftware.com> wrote in 
message news:AEEB3008-9A28-4E71-9BE3-706D26DA449E at sosmartsoftware.com...
> I would like to build a range of harmonised colours in the same tint:
> Something like  "162,173,215","182,193,235","202,213,255", etc.
> As long than a colour value is less than 255, it does not seem to be  a 
> problem as above.
> But I don't find out how to calculate consistent values once a value  has 
> reached 255.
> Any ideas?