e:cue Knowledge Base - 🎨Color Wheel values and White percentage

Customer ask often, how to retrieve the White percentage from the Color Wheel.

And unfortunately the answer is not that easy as expected.

First of all we operate in different color spaces. The RGBW fixtures use an RGBW color space.

The RGB fixtures and the Color Wheel use only an RGB color space.

So the Color Wheel does not support a White channel. It is an additional component here.

So how can we now get the White value?

The easier approach is to use RGB effects and then convert them to RGBW instead of using RGBW effects.

And when we do so a "Color to RGBW" effect will do the conversion for us automatically, when working with effects in the timeline and will calculate the White value.

Here Sympholight offers different choices of conversion for the user as you might already have discovered in the effects.

and this could be the end of the article.

But what if I want to offer an additional White fader in the ActionPad that the end customer can manually set the white part?

You can use the SetProperty and GetProperty blocks to access the Color and the White offset. Then use "White Offset" as White channel value.

Connect the Color Wheel to the effect color and an additional 0-100 Fader to Property "White Offset".

This will only work when setting an identifier each for the Color and the Offset in the Properties page of the Content tab.

(1) The identifier to be set, in order to access the white channel conversion and offset properties.
(3) The offset that will be changed is this one.

(2) The identifier to be set, in order to access the ProPhotoColor value of the effect.

(4) This is the color value that can be accessed.

If you want to use one of the built in conversions, just select it in the Properties page and it works.

For effects, that add the offset on top it might also be useful to add the fader.

You can also change the conversion type by the "White Channel" property. Here you will need to set a value between 0 and 7 corresponding to the position in the drop down box:

Example: If you only want to use the fader value as manual offset choose 4.

So you do not need to retrieve the White value.