One color, two colors, few colors, and many many more... A snippet to extend Color collection in Java SE.

DrawColor.java

import java.awt.Color;

public enum DrawColor {
	
	//Colors from http://www.rapidtables.com/web/color/RGB_Color.htm
	maroon("800000",128,0,0),
	dark_red("8B0000",139,0,0),
	brown("A52A2A",165,42,42),
	firebrick("B22222",178,34,34),
	crimson("DC143C",220,20,60),
	red("FF0000",255,0,0),
	tomato("FF6347",255,99,71),
	coral("FF7F50",255,127,80),
	indian_red("CD5C5C",205,92,92),
	light_coral("F08080",240,128,128),
	dark_salmon("E9967A",233,150,122),
	salmon("FA8072",250,128,114),
	light_salmon("FFA07A",255,160,122),
	orange_red("FF4500",255,69,0),
	dark_orange("FF8C00",255,140,0),
	orange("FFA500",255,165,0),
	gold("FFD700",255,215,0),
	dark_golden_rod("B8860B",184,134,11),
	golden_rod("DAA520",218,165,32),
	pale_golden_rod("EEE8AA",238,232,170),
	dark_khaki("BDB76B",189,183,107),
	khaki("F0E68C",240,230,140),
	olive("808000",128,128,0),
	yellow("FFFF00",255,255,0),
	yellow_green("9ACD32",154,205,50),
	dark_olive_green("556B2F",85,107,47),
	olive_drab("6B8E23",107,142,35),
	lawn_green("7CFC00",124,252,0),
	chart_reuse("7FFF00",127,255,0),
	green_yellow("ADFF2F",173,255,47),
	dark_green("006400",0,100,0),
	green("008000",0,128,0),
	forest_green("228B22",34,139,34),
	lime("00FF00",0,255,0),
	lime_green("32CD32",50,205,50),
	light_green("90EE90",144,238,144),
	pale_green("98FB98",152,251,152),
	dark_sea_green("8FBC8F",143,188,143),
	medium_spring_green("00FA9A",0,250,154),
	spring_green("00FF7F",0,255,127),
	sea_green("2E8B57",46,139,87),
	medium_aqua_marine("66CDAA",102,205,170),
	medium_sea_green("3CB371",60,179,113),
	light_sea_green("20B2AA",32,178,170),
	dark_slate_gray("2F4F4F",47,79,79),
	teal("008080",0,128,128),
	dark_cyan("008B8B",0,139,139),
	aqua("00FFFF",0,255,255),
	cyan("00FFFF",0,255,255),
	light_cyan("E0FFFF",224,255,255),
	dark_turquoise("00CED1",0,206,209),
	turquoise("40E0D0",64,224,208),
	medium_turquoise("48D1CC",72,209,204),
	pale_turquoise("AFEEEE",175,238,238),
	aqua_marine("7FFFD4",127,255,212),
	powder_blue("B0E0E6",176,224,230),
	cadet_blue("5F9EA0",95,158,160),
	steel_blue("4682B4",70,130,180),
	corn_flower_blue("6495ED",100,149,237),
	deep_sky_blue("00BFFF",0,191,255),
	dodger_blue("1E90FF",30,144,255),
	light_blue("ADD8E6",173,216,230),
	sky_blue("87CEEB",135,206,235),
	light_sky_blue("87CEFA",135,206,250),
	midnight_blue("191970",25,25,112),
	navy("000080",0,0,128),
	dark_blue("00008B",0,0,139),
	medium_blue("0000CD",0,0,205),
	blue("0000FF",0,0,255),
	royal_blue("4169E1",65,105,225),
	blue_violet("8A2BE2",138,43,226),
	indigo("4B0082",75,0,130),
	dark_slate_blue("483D8B",72,61,139),
	slate_blue("6A5ACD",106,90,205),
	medium_slate_blue("7B68EE",123,104,238),
	medium_purple("9370DB",147,112,219),
	dark_magenta("8B008B",139,0,139),
	dark_violet("9400D3",148,0,211),
	dark_orchid("9932CC",153,50,204),
	medium_orchid("BA55D3",186,85,211),
	purple("800080",128,0,128),
	thistle("D8BFD8",216,191,216),
	plum("DDA0DD",221,160,221),
	violet("EE82EE",238,130,238),
	magenta("FF00FF",255,0,255),
	orchid("DA70D6",218,112,214),
	medium_violet_red("C71585",199,21,133),
	pale_violet_red("DB7093",219,112,147),
	deep_pink("FF1493",255,20,147),
	hot_pink("FF69B4",255,105,180),
	light_pink("FFB6C1",255,182,193),
	pink("FFC0CB",255,192,203),
	antique_white("FAEBD7",250,235,215),
	beige("F5F5DC",245,245,220),
	bisque("FFE4C4",255,228,196),
	blanched_almond("FFEBCD",255,235,205),
	wheat("F5DEB3",245,222,179),
	corn_silk("FFF8DC",255,248,220),
	lemon_chiffon("FFFACD",255,250,205),
	light_golden_rod_yellow("FAFAD2",250,250,210),
	light_yellow("FFFFE0",255,255,224),
	saddle_brown("8B4513",139,69,19),
	sienna("A0522D",160,82,45),
	chocolate("D2691E",210,105,30),
	peru("CD853F",205,133,63),
	sandy_brown("F4A460",244,164,96),
	burly_wood("DEB887",222,184,135),
	tan("D2B48C",210,180,140),
	rosy_brown("BC8F8F",188,143,143),
	moccasin("FFE4B5",255,228,181),
	navajo_white("FFDEAD",255,222,173),
	peach_puff("FFDAB9",255,218,185),
	misty_rose("FFE4E1",255,228,225),
	lavender_blush("FFF0F5",255,240,245),
	linen("FAF0E6",250,240,230),
	old_lace("FDF5E6",253,245,230),
	papaya_whip("FFEFD5",255,239,213),
	sea_shell("FFF5EE",255,245,238),
	mint_cream("F5FFFA",245,255,250),
	slate_gray("708090",112,128,144),
	light_slate_gray("778899",119,136,153),
	light_steel_blue("B0C4DE",176,196,222),
	lavender("E6E6FA",230,230,250),
	floral_white("FFFAF0",255,250,240),
	alice_blue("F0F8FF",240,248,255),
	ghost_white("F8F8FF",248,248,255),
	honeydew("F0FFF0",240,255,240),
	ivory("FFFFF0",255,255,240),
	azure("F0FFFF",240,255,255),
	snow("FFFAFA",255,250,250),
	black("000000",0,0,0),
	dim_gray("696969",105,105,105),
	gray("808080",128,128,128),
	dark_gray("A9A9A9",169,169,169),
	silver("C0C0C0",192,192,192),
	light_gray("D3D3D3",211,211,211),
	gainsboro("DCDCDC",220,220,220),
	white_smoke("F5F5F5",245,245,245),
	white("FFFFFF",255,255,255);

	String hex;
	int r;
	int g;
	int b;
			
	DrawColor(String hex, int r, int g, int b) {
		this.hex = hex;
		this.r = r;
		this.g = g;
		this.b = b;
	}
	
	public Color getColor() {
		return getColor(1.0f);
	}
	
	public Color getColor(float alpha) {
		return new Color(convert(r), convert(g), convert(b), alpha);
	}
	
	public String getHTML() {
		return "#" + hex;
	}
	
	public int getRed() {
		return r;
	}
	
	public int getGreen() {
		return g;
	}

	public int getBlue() {
		return b;
	}
	
	private float convert(int x) {
		float MAX = 255f;
		float VALUE = (float)x;
		return VALUE / MAX;
	}
	
}