Random color generation and conversion between hexadecimal color and RGB color values

/**

* Random COLOR GENERATION

* @ Return the random hexadecimal color.

*/

Function randomColor (){

Var colorStr = Math. floor (Math. random () * 0 xFFFFFF). toString (16). toUpperCase ();

Return "#" + "000000". substring (-6-colorStr) + colorStr;

}

 

/**

* Convert hexadecimal color to RGB color

* @ Param color the hexadecimal color to be converted

* @ Return RGB color

Function colorHexToRGB (color ){

Color = color. toUpperCase ();

Var regexpHex =/^ # [0-9a-fA-F] {3, 6} $/; // Hex

If (regexpHex. test (color )){

Var hexArray = new Array ();

Var count = 1;

For (var I = 1; I <= 3; I ++ ){

If (color. length-2 * I> 3-i ){

HexArray. push (Number ("0x" + color. substring (count, count + 2 )));

Count + = 2;

} Else {

HexArray. push (Number ("0x" + color. charAt (count) + color. charAt (count )));

Count + = 1;

}

}

Return "RGB (" + hexArray. join (",") + ")";

} Else {

Return color;

}

}

 

/**

* Convert RGB color to hexadecimal color

* @ Param color the RGB color to be converted

* @ Return hexadecimal color

*/

Function colorRGBToHex (color ){

Var regexpRGB =/^ (rgb | RGB) \ ([0-9] {1, 3}, \ s? [0-9] {1, 3}, \ s? [0-9] {1, 3} \) $/; // RGB

If (regexpRGB. test (color )){

Color = color. replace (/(\ (| \) | rgb | RGB) */g, ""). split (",");

Var colorHex = "#";

For (var I = 0; I <color. length; I ++ ){

Var hex = Number (color [I]). toString (16 );

If (hex. length = 1) hex = "0" + hex;

ColorHex + = hex;

}

Return colorHex;

} Else {

Return color;

}

}

 

From the dark day, how do you understand the dark night?