How to create openCV image of certain (R, G, B) color and get that color name?

Question

I need to create an image filled with some (R,G,B) color. And get that color name like some (R,G,B) = black or red and so on. Can we do such thing with openCV, and how to do it?

Answer 1

Static color map class with static methods (both answers combined). Simply copy and use.

#pragma once

#include <opencv/cv.hpp>
#include <opencv/cv.h>

class Color
{
public:
    static cv::Scalar aliceblue;
    static cv::Scalar antiquewhite;
    static cv::Scalar aqua;
    static cv::Scalar aquamarine;
    static cv::Scalar azure;
    static cv::Scalar beige;
    static cv::Scalar bisque;
    static cv::Scalar black;
    static cv::Scalar blanchedalmond;
    static cv::Scalar blue;
    static cv::Scalar blueviolet;
    static cv::Scalar brown;
    static cv::Scalar burlywood;
    static cv::Scalar cadetblue;
    static cv::Scalar chartreuse;
    static cv::Scalar chocolate;
    static cv::Scalar coral;
    static cv::Scalar cornflowerblue;
    static cv::Scalar cornsilk;
    static cv::Scalar crimson;
    static cv::Scalar cyan;
    static cv::Scalar darkblue;
    static cv::Scalar darkcyan;
    static cv::Scalar darkgoldenrod;
    static cv::Scalar darkgray;
    static cv::Scalar darkgreen;
    static cv::Scalar darkgrey;
    static cv::Scalar darkkhaki;
    static cv::Scalar darkmagenta;
    static cv::Scalar darkolivegreen;
    static cv::Scalar darkorange;
    static cv::Scalar darkorchid;
    static cv::Scalar darkred;
    static cv::Scalar darksalmon;
    static cv::Scalar darkseagreen;
    static cv::Scalar darkslateblue;
    static cv::Scalar darkslategray;
    static cv::Scalar darkslategrey;
    static cv::Scalar darkturquoise;
    static cv::Scalar darkviolet;
    static cv::Scalar deeppink;
    static cv::Scalar deepskyblue;
    static cv::Scalar dimgray;
    static cv::Scalar dimgrey;
    static cv::Scalar dodgerblue;
    static cv::Scalar firebrick;
    static cv::Scalar floralwhite;
    static cv::Scalar forestgreen;
    static cv::Scalar fuchsia;
    static cv::Scalar gainsboro;
    static cv::Scalar ghostwhite;
    static cv::Scalar gold;
    static cv::Scalar goldenrod;
    static cv::Scalar gray;
    static cv::Scalar green;
    static cv::Scalar greenyellow;
    static cv::Scalar grey;
    static cv::Scalar honeydew;
    static cv::Scalar hotpink;
    static cv::Scalar indianred;
    static cv::Scalar indigo;
    static cv::Scalar ivory;
    static cv::Scalar khaki;
    static cv::Scalar lavender;
    static cv::Scalar lavenderblush;
    static cv::Scalar lawngreen;
    static cv::Scalar lemonchiffon;
    static cv::Scalar lightblue;
    static cv::Scalar lightcoral;
    static cv::Scalar lightcyan;
    static cv::Scalar lightgoldenrodyellow;
    static cv::Scalar lightgray;
    static cv::Scalar lightgreen;
    static cv::Scalar lightgrey;
    static cv::Scalar lightpink;
    static cv::Scalar lightsalmon;
    static cv::Scalar lightseagreen;
    static cv::Scalar lightskyblue;
    static cv::Scalar lightslategray;
    static cv::Scalar lightslategrey;
    static cv::Scalar lightsteelblue;
    static cv::Scalar lightyellow;
    static cv::Scalar lime;
    static cv::Scalar limegreen;
    static cv::Scalar linen;
    static cv::Scalar magenta;
    static cv::Scalar maroon;
    static cv::Scalar mediumaquamarine;
    static cv::Scalar mediumblue;
    static cv::Scalar mediumorchid;
    static cv::Scalar mediumpurple;
    static cv::Scalar mediumseagreen;
    static cv::Scalar mediumslateblue;
    static cv::Scalar mediumspringgreen;
    static cv::Scalar mediumturquoise;
    static cv::Scalar mediumvioletred;
    static cv::Scalar midnightblue;
    static cv::Scalar mintcream;
    static cv::Scalar mistyrose;
    static cv::Scalar moccasin;
    static cv::Scalar navajowhite;
    static cv::Scalar navy;
    static cv::Scalar oldlace;
    static cv::Scalar olive;
    static cv::Scalar olivedrab;
    static cv::Scalar orange;
    static cv::Scalar orangered;
    static cv::Scalar orchid;
    static cv::Scalar palegoldenrod;
    static cv::Scalar palegreen;
    static cv::Scalar paleturquoise;
    static cv::Scalar palevioletred;
    static cv::Scalar papayawhip;
    static cv::Scalar peachpuff;
    static cv::Scalar peru;
    static cv::Scalar pink;
    static cv::Scalar plum;
    static cv::Scalar powderblue;
    static cv::Scalar purple;
    static cv::Scalar red;
    static cv::Scalar rosybrown;
    static cv::Scalar royalblue;
    static cv::Scalar saddlebrown;
    static cv::Scalar salmon;
    static cv::Scalar sandybrown;
    static cv::Scalar seagreen;
    static cv::Scalar seashell;
    static cv::Scalar sienna;
    static cv::Scalar silver;
    static cv::Scalar skyblue;
    static cv::Scalar slateblue;
    static cv::Scalar slategray;
    static cv::Scalar slategrey;
    static cv::Scalar snow;
    static cv::Scalar springgreen;
    static cv::Scalar steelblue;
    static cv::Scalar tan;
    static cv::Scalar teal;
    static cv::Scalar thistle;
    static cv::Scalar tomato;
    static cv::Scalar turquoise;
    static cv::Scalar violet;
    static cv::Scalar wheat;
    static cv::Scalar white;
    static cv::Scalar whitesmoke;
    static cv::Scalar yellow;
    static cv::Scalar yellowgreen;
};

//In the cpp file add:

cv::Scalar Color::aliceblue(255, 248, 240);
cv::Scalar Color::antiquewhite(215, 235, 250);
cv::Scalar Color::aqua(255, 255, 0);
cv::Scalar Color::aquamarine(212, 255, 127);
cv::Scalar Color::azure(255, 255, 240);
cv::Scalar Color::beige(220, 245, 245);
cv::Scalar Color::bisque(196, 228, 255);
cv::Scalar Color::black(0, 0, 0);
cv::Scalar Color::blanchedalmond(205, 235, 255);
cv::Scalar Color::blue(255, 0, 0);
cv::Scalar Color::blueviolet(226, 43, 138);
cv::Scalar Color::brown(42, 42, 165);
cv::Scalar Color::burlywood(135, 184, 222);
cv::Scalar Color::cadetblue(160, 158, 95);
cv::Scalar Color::chartreuse(0, 255, 127);
cv::Scalar Color::chocolate(30, 105, 210);
cv::Scalar Color::coral(80, 127, 255);
cv::Scalar Color::cornflowerblue(237, 149, 100);
cv::Scalar Color::cornsilk(220, 248, 255);
cv::Scalar Color::crimson(60, 20, 220);
cv::Scalar Color::cyan(255, 255, 0);
cv::Scalar Color::darkblue(139, 0, 0);
cv::Scalar Color::darkcyan(139, 139, 0);
cv::Scalar Color::darkgoldenrod(11, 134, 184);
cv::Scalar Color::darkgray(169, 169, 169);
cv::Scalar Color::darkgreen(0, 100, 0);
cv::Scalar Color::darkgrey(169, 169, 169);
cv::Scalar Color::darkkhaki(107, 183, 189);
cv::Scalar Color::darkmagenta(139, 0, 139);
cv::Scalar Color::darkolivegreen(47, 107, 85);
cv::Scalar Color::darkorange(0, 140, 255);
cv::Scalar Color::darkorchid(204, 50, 153);
cv::Scalar Color::darkred(0, 0, 139);
cv::Scalar Color::darksalmon(122, 150, 233);
cv::Scalar Color::darkseagreen(143, 188, 143);
cv::Scalar Color::darkslateblue(139, 61, 72);
cv::Scalar Color::darkslategray(79, 79, 47);
cv::Scalar Color::darkslategrey(79, 79, 47);
cv::Scalar Color::darkturquoise(209, 206, 0);
cv::Scalar Color::darkviolet(211, 0, 148);
cv::Scalar Color::deeppink(147, 20, 255);
cv::Scalar Color::deepskyblue(255, 191, 0);
cv::Scalar Color::dimgray(105, 105, 105);
cv::Scalar Color::dimgrey(105, 105, 105);
cv::Scalar Color::dodgerblue(255, 144, 30);
cv::Scalar Color::firebrick(34, 34, 178);
cv::Scalar Color::floralwhite(240, 250, 255);
cv::Scalar Color::forestgreen(34, 139, 34);
cv::Scalar Color::fuchsia(255, 0, 255);
cv::Scalar Color::gainsboro(220, 220, 220);
cv::Scalar Color::ghostwhite(255, 248, 248);
cv::Scalar Color::gold(0, 215, 255);
cv::Scalar Color::goldenrod(32, 165, 218);
cv::Scalar Color::gray(128, 128, 128);
cv::Scalar Color::green(0, 128, 0);
cv::Scalar Color::greenyellow(47, 255, 173);
cv::Scalar Color::grey(128, 128, 128);
cv::Scalar Color::honeydew(240, 255, 240);
cv::Scalar Color::hotpink(180, 105, 255);
cv::Scalar Color::indianred(92, 92, 205);
cv::Scalar Color::indigo(130, 0, 75);
cv::Scalar Color::ivory(240, 255, 255);
cv::Scalar Color::khaki(140, 230, 240);
cv::Scalar Color::lavender(250, 230, 230);
cv::Scalar Color::lavenderblush(245, 240, 255);
cv::Scalar Color::lawngreen(0, 252, 124);
cv::Scalar Color::lemonchiffon(205, 250, 255);
cv::Scalar Color::lightblue(230, 216, 173);
cv::Scalar Color::lightcoral(128, 128, 240);
cv::Scalar Color::lightcyan(255, 255, 224);
cv::Scalar Color::lightgoldenrodyellow(210, 250, 250);
cv::Scalar Color::lightgray(211, 211, 211);
cv::Scalar Color::lightgreen(144, 238, 144);
cv::Scalar Color::lightgrey(211, 211, 211);
cv::Scalar Color::lightpink(193, 182, 255);
cv::Scalar Color::lightsalmon(122, 160, 255);
cv::Scalar Color::lightseagreen(170, 178, 32);
cv::Scalar Color::lightskyblue(250, 206, 135);
cv::Scalar Color::lightslategray(153, 136, 119);
cv::Scalar Color::lightslategrey(153, 136, 119);
cv::Scalar Color::lightsteelblue(222, 196, 176);
cv::Scalar Color::lightyellow(224, 255, 255);
cv::Scalar Color::lime(0, 255, 0);
cv::Scalar Color::limegreen(50, 205, 50);
cv::Scalar Color::linen(230, 240, 250);
cv::Scalar Color::magenta(255, 0, 255);
cv::Scalar Color::maroon(0, 0, 128);
cv::Scalar Color::mediumaquamarine(170, 205, 102);
cv::Scalar Color::mediumblue(205, 0, 0);
cv::Scalar Color::mediumorchid(211, 85, 186);
cv::Scalar Color::mediumpurple(219, 112, 147);
cv::Scalar Color::mediumseagreen(113, 179, 60);
cv::Scalar Color::mediumslateblue(238, 104, 123);
cv::Scalar Color::mediumspringgreen(154, 250, 0);
cv::Scalar Color::mediumturquoise(204, 209, 72);
cv::Scalar Color::mediumvioletred(133, 21, 199);
cv::Scalar Color::midnightblue(112, 25, 25);
cv::Scalar Color::mintcream(250, 255, 245);
cv::Scalar Color::mistyrose(225, 228, 255);
cv::Scalar Color::moccasin(181, 228, 255);
cv::Scalar Color::navajowhite(173, 222, 255);
cv::Scalar Color::navy(128, 0, 0);
cv::Scalar Color::oldlace(230, 245, 253);
cv::Scalar Color::olive(0, 128, 128);
cv::Scalar Color::olivedrab(35, 142, 107);
cv::Scalar Color::orange(0, 165, 255);
cv::Scalar Color::orangered(0, 69, 255);
cv::Scalar Color::orchid(214, 112, 218);
cv::Scalar Color::palegoldenrod(170, 232, 238);
cv::Scalar Color::palegreen(152, 251, 152);
cv::Scalar Color::paleturquoise(238, 238, 175);
cv::Scalar Color::palevioletred(147, 112, 219);
cv::Scalar Color::papayawhip(213, 239, 255);
cv::Scalar Color::peachpuff(185, 218, 255);
cv::Scalar Color::peru(63, 133, 205);
cv::Scalar Color::pink(203, 192, 255);
cv::Scalar Color::plum(221, 160, 221);
cv::Scalar Color::powderblue(230, 224, 176);
cv::Scalar Color::purple(128, 0, 128);
cv::Scalar Color::red(0, 0, 255);
cv::Scalar Color::rosybrown(143, 143, 188);
cv::Scalar Color::royalblue(225, 105, 65);
cv::Scalar Color::saddlebrown(19, 69, 139);
cv::Scalar Color::salmon(114, 128, 250);
cv::Scalar Color::sandybrown(96, 164, 244);
cv::Scalar Color::seagreen(87, 139, 46);
cv::Scalar Color::seashell(238, 245, 255);
cv::Scalar Color::sienna(45, 82, 160);
cv::Scalar Color::silver(192, 192, 192);
cv::Scalar Color::skyblue(235, 206, 135);
cv::Scalar Color::slateblue(205, 90, 106);
cv::Scalar Color::slategray(144, 128, 112);
cv::Scalar Color::slategrey(144, 128, 112);
cv::Scalar Color::snow(250, 250, 255);
cv::Scalar Color::springgreen(127, 255, 0);
cv::Scalar Color::steelblue(180, 130, 70);
cv::Scalar Color::tan(140, 180, 210);
cv::Scalar Color::teal(128, 128, 0);
cv::Scalar Color::thistle(216, 191, 216);
cv::Scalar Color::tomato(71, 99, 255);
cv::Scalar Color::turquoise(208, 224, 64);
cv::Scalar Color::violet(238, 130, 238);
cv::Scalar Color::wheat(179, 222, 245);
cv::Scalar Color::white(255, 255, 255);
cv::Scalar Color::whitesmoke(245, 245, 245);
cv::Scalar Color::yellow(0, 255, 255);
cv::Scalar Color::yellowgreen(50, 205, 154);