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 12.0   [Dec-12, 2023]
   
  • the function ContrastBWColor returns the highest contrast black/white color
  • the function ObtainColorName provides now an overloaded version which returns both the hex code and the color name
  • the new function AdjustColorIntSat allows you to adjust the intensity and saturation of a color
  • bug fix: TColorArray.FillbyInterpolation crashed if the color palette was shorter than two entries
  
  
• Release 10.7   [Aug-24, 2020]
   
  • the procedures ColorToHSV, HSVtoColor, HSVtoRGB and RGBtoHSV provide conversion routines for the HSV color system
  • the procedures ColorToHSL and HSLtoColor convert between TColor and the HSL color model
  • the procedures HSLtoRGB and RGBtoHSL convert between HSL and RGB color space
  • the functions HSItoColor and ColorToHSI transform a HSI color to the (RGB) TColor and vice versa
  • the new method LogTransform allows to create a logarithmic color scale
  • the new method TColorArray.ReverseRGB reverses the RGB order
  • the new methods TColorArray.Backup and TColorArray.Restore provide a simple backup and restore capability
  
  
• Release 10.6   [Mar-09, 2018]
   
  • the constant array AllSDLColors contains all colors declared in the SDL Component Suite
  • the constant array AllSDLColorNames contains the names of all colors declared in the SDL Component Suite
  • the function ObtainColorName returns the name of a color
  
  
• Release 10.5   [Oct-10, 2016]
   
  • no changes
  
  
• 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