Add RGBW conversion to ColorUtil actions

Signed-off-by: Holger Friedrich <mail@holger-friedrich.de>

addons/actions.md

@@ -205,12 +205,14 @@ if ((thingStatusInfo !== null) && (thingStatusInfo.getStatus().toString() == "ON
 ### Color utilities
 
 - `int[] hsbToRgb(HSBType hsb)`: transforms HSB to RGB returning an array of three int with the RGB values in the range 0 to 255
+- `int[] hsbToRgbw(HSBType hsb)`: transforms HSB to RGBW returning an array of four int with the RGB and W values in the range 0 to 255
 - `PercentType[] hsbToRgbPercent(HSBType hsb)`: transforms HSB to RGB returning an array of three PercentType with the RGB values in the range 0 to 100 percent
+- `PercentType[] hsbToRgbwPercent(HSBType hsb)`: transforms HSB to RGBW returning an array of four PercentType with the RGB and W values in the range 0 to 100 percent
 - `int hsbTosRgb(HSBType hsb)`: transforms HSB to the RGB value of the color in the default sRGB color model (Bits 24-31 are alpha, 16-23 are red, 8-15 are green, 0-7 are blue)
 - `double[] hsbToXY(HSBType hsb)`: transforms HSB to CIE 1931 "xy" format using default color Gamut, returning an array of three double with the closest matching CIE 1931 x,y,Y in the range 0.0000 to 1.0000
 - `double[] hsbToXY(HSBType hsb, double[] gamutR, double[] gamutG, double[] gamutB)`: transforms HSB to CIE 1931 "xy" format using specific color Gamut, returning an array of three double with the closest matching CIE 1931 x,y,Y in the range 0.0000 to 1.0000
 - `HSBType rgbToHsb(int[] rgb)`: transforms RGB (array of three or four int with the RGB(W) values in the range 0 to 255) to HSB
-- `HSBType rgbToHsb(PercentType[] rgb)`: transforms RGB (array of three PercentType with the RGB values in the range 0 to 100 percent) to HSB
+- `HSBType rgbToHsb(PercentType[] rgbw)`: transforms RGB (array of three or four PercentType with the RGB(W) values in the range 0 to 100 percent) to HSB
 - `HSBType xyToHsb(double[] xy)`: transforms CIE 1931 "xy" format (array of double with CIE 1931 x,y[,Y] in the range 0.0000 to 1.0000 with Y being optional) to HSB using default color Gamut
 - `HSBType xyToHsb(double[] xy, double[] gamutR, double[] gamutG, double[] gamutB)`: transforms CIE 1931 "xy" format (array of double with CIE 1931 x,y[,Y] in the range 0.0000 to 1.0000 with Y being optional) to HSB using specific color Gamut