drewish

PEAR Image_Color2

Between August 2005 and January 2006 I developed a PHP5 color conversion library which became the PEAR Image_Color2 package.

The impetus for this was trying to sort my Flickr favorites by color. After some experimentation and frustration with the RGB color model I did some research and discovered that I really wanted to be sorting by hue. So converting to color model like HSL would make it much easier. I spent some building a basic color conversion framework then polished it up enough to be published as a PEAR module.

The package supports conversions between the following color models:

• RGB
• CMYK — Used in printing.
• Grayscale — Perceptively weighted gray scale.
• Hex — Hex RGB colors, e.g. #abcdef.
• HSL — Used in CSS3 to define colors.
• HSV — Used by Photoshop and other graphics packages.
• Named — RGB value for named colors like black, khaki, etc.
• WebsafeHex — Just like the hex mode, but rounds to web safe colors.