trying to convert rgb from a .net Color to a string such as “red” or “blue”

Question

All of my methods are failing me in various ways. different lighting can mess it all up too.

has anyone every trying to return a name given a rgb value? \"red\" \"gr

Answer 1

Here is a simple name scheme using two qualifiers and a color name:

string ColorName(Color c)
{
    List hues = new List()
    { 0, 15, 35, 44, 54, 63, 80, 160, 180, 200, 244, 280, 350, 360};
    List hueNames = new List()
        { "red", "orange-red", "orange", "yellow-orange", "yellow",
          "yellow-green",   "green"  , "blue-green" , "cyan", "blue", 
          "violet", "purple", "red" };

    float h = c.GetHue();
    float s = c.GetSaturation();
    float b = (c.R * 0.299f + c.G * 0.587f + c.B *0.114f) / 256f;

    string name = s < 0.35f ? "pale " : s > 0.8f ? "vivid " : "";
    name += b < 0.35f ? "dark " : b > 0.8f ? "light " : "";
    for (int i = 0; i < hues.Count - 1; i++)
        if (h >= hues[i] && h <= hues[i+1] )
        {
            name += hueNames[i];
            break;
        }
    return name;
}

You can easily adapt it if you want the blues to be more differentiated etc..