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

2012-02-16 Thread Wilhelm Sanke
On Wed Feb, 2012, Keith (Gulf Breeze Ortho Lab) keith at gulfbreezeortholab.com 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 fo

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

2012-02-15 Thread Bob Sneidar
Seems to me you could add 10% to each of the RGB values by multiplying each by 1.1, then round them up. (A roundUp function can be made by div'ing a value by itself, then adding the mod of a value by itself and conditionally adding 1 if the mod is not 0). That would give you the shade lighter. D

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

2012-02-15 Thread Paul Hibbert
Hey Keith, One site that could help you is Scott Rossi's tactilemedia.com he has some great tutorials and the 'Color Slider' tutorial should give you all the info you need to convert your colour data into HSB (HSL), then you can just compare the brightness values and respond accordingly. The t

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

2012-02-15 Thread 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 b

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

2012-02-15 Thread Ken Corey
On 15/02/2012 11:15, Keith (Gulf Breeze Ortho Lab) wrote: 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? Here are a few approaches: http:

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

2012-02-15 Thread Keith (Gulf Breeze Ortho Lab)
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.) Programmatic