The little extract below from w3schools offers a useful explanation about RGB... RGB Colors RGB color values are supported in all browsers. An RGB color value is specified with: rgb( RED , GREEN , BLUE ). Each parameter defines the intensity of the color as an integer between 0 and 255. Example
Note: The 3 individual RGB values can also be combined into a 24bit RGB colour value, as explained in the following w3schools extract... Hexadecimal Colors Hexadecimal color values are also supported in all browsers.A hexadecimal color is specified with: #RRGGBB. RR (red), GG (green) and BB (blue) are hexadecimal integers between 00 and FF specifying the intensity of the color (ie: from 0 to 255). For example, #0000FF is displayed as blue, because the blue component is set to its highest value (FF) and the others are set to 00. In Annex, hex numbers are prefixed with &h (not #), so the example above would be &h0000FF Hex numbers have their corresponding decimal equivalent and vice versa, so &hFF in Annex is equivalent to 255. Two Annex RGB instructions that can be used for RGB LED lighting are... SonoffB1.rgb R, G, B Neo.Pixel led_pos, R, G, B Both those instructions can optionally accept a single 24bit combined colour value instead of the 3 individual 8bit R,G,B values. Annex offers a convenient function which can take the three R,G,B values and combines them into a 24bit value... Neo.RGB( R, G, B ) "'returns the 3
supplied R,G,B colours merged into a single 24bit RGB color value,
useful for the NEO.PIXEL function and web page colors etc" Although prefixed "NEO" it's actually a numeric function that can be used to combine any 3 individual 8bit numbers into a single 24bit number. |
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