The unit SDLColors contains a collection of basic declarations, procedures and functions for manipulating colors. Amongst these routines are conversion functions for HSI (hue, saturation, intensity) and RGB (red, green, blue) color systems. Further, the unit SDLColors contains the class TColorArray which supports the handling of color arrays.

More details can be found in the online help pages.

Free Sample Program

SDLColors

Uses the unit SDLCOLORS to convert HSI (hue, saturation, intensity) values to RGB (red, green, blue). The user may set the HSI values to compose a color. The selected color is displayed as an HTML value, too.

colorcalc.zip (227 kB)

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What's new:

• Release 10.4   [Jun-02, 2015]
   
  • the functions ColorToHexStr and HexStrToColor convert colors into a hexadecimal string and vice versa
  • the class TColorArray offers now several new methods: Fill, InvertColors, MirrorColors
  • bug fix: InvertColor returned a wrong color
  
  
• Release 10.3   [Oct-06, 2014]
   
  • predefined color arrays extended by a high contrast geographic color array and a color array designed to support people suffering from color perception deficiencies
  • the new function ColorToGray converts colors to gray values
  • a few additional colors declared (clCrimson, clRebeccaPurple, clMagenta)
  • the list of X11 colors has been combined into the array X11Colors
  • the new methods TColorArray.ReadFromOpenTextFile and WriteToOpenTextFile allow to read and write an already open color file
  
  
• Release 10.2   [May-30, 2013]
   
  • no changes
  
  
• Release 10.1   [Oct-29, 2012]
   
  • color array ColorArray_Contrast defined
  • the new function TColorArray.IsEqual compares two color arrays
  
  
• Release 10.0   [Oct-4, 2011]
   
  • method TColorArray.Assign implemented
  • new function MeanColor for averaging two colors
  
  
• Release 9.7   [May-31, 2010]
   
  • no changes
  
  
• Release 9.51   [Dec-01, 2008]
   
  • no changes
  
  
• Release 9.5   [Oct-31, 2008]
   
  • new component TColorArray supports the handling of arrays of colors
  • new function RGBColorDistance calculates the distance between two colors.
  • new functions RGBtoGrayColor and ColorToGrayColor implemented
  • new function WavelengthToColor calculates the color associated with a particular wavelength of light
  
  
• Release 9.0   [May-28, 2007]
   
  • no changes
  
  
• Release 8.5   [Feb-18, 2006]
   
  • new function Interpolate3Colors implemented
  
  
• Release 8.2   [Nov-03, 2004]
   
  • new function RGBtoGray implemented
  
  
• Release 8.1   [Aug-29, 2004]
   
  • available for Delphi™ 8 for .NET
  
  
• Release 8.0   [Apr-01, 2004]
   
  • SDLColors is now available to the public