This library enables a developer to abstract away from the time consuming imlementation of colour map management and focus on the project. The Spectrum library is an open source C++ header library that is simple to use with no installation required. Just add the .h file to your project and you're good to go.

First off, the developer needs to call the init function as early as possible in the program run time...

	int main(int argc, char *argv[])
	{
		ColourManager::Init_ColourManager(); 
    
		QApplication a(argc, argv);
		MainWindow w;
		w.showMaximized();
		return a.exec();
	}

Once the init function has been run, the developer can create a ColourManager object using and upper and lower value range.

	float lowerRange=0;
	float upperRange=100;
	ColourManager manager(lowerRange,upperRange);

When returning a colour value the developer can choose from a selection of functions, depending on their data and requirements. In this example, we choose the interpolated colour value.

	float val = 27.0f;
	Colour c = manager.getInterpolatedColour(val);

This Colour object `c' now contains the interpolated colour between the upper and lower range of the colour map. This variable holds the RGB channel values and Hex colour. To access these;

  //Returns channel values between 0-255
  GLint iR = c.getIntR();
  GLint iG = c.getIntG();
  GLint iB = c.getIntB();

  //Returns channel values between 0.0-1.0
  float fR = c.getR();
  float rG = c.getG();
  float fB = c.get();

  //Return hex colour value
  std::string hexCol = getHexColour();