Is there a way to find a lighter and darker shade of a RGB color programmatically?

[Keith Clarke]

...not sure if this helps but perhaps one way might be to emulate the colour tools palette, by transforming the RGB values to/from HSB and then vary the saturation and/or brightness values. 

I guess it depends what you mean by the term 'shade'? And of course, how to transform the values would be a different question! ;-)
Best,
Keith..
   
On 15 Feb 2012, at 11:15, Keith (Gulf Breeze Ortho Lab) wrote:

> Hi All,
> 
> I have a problem... If a user selects a color and I put it into a variable (as RGB), how can I find a shade that is several shades lighter, and a shade that is several shades darker, also in RGB format?
> 
> For example, I put 0,255,64 into myVar. (This color a shade of green.) Programmatically, how can I find a shade that is several shades lighter in green and a shade that is several shades darker in green from this base color?
> 
> (By the way... Is there a way in LiveCode to determine the hue of a color and change the value?)
> 
> Any help would be most appreciated...
> 
> Thanks!
> 
> - Boo
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