# Colorpicker payload sending RGB values all zero

**URL:** <https://discourse.nodered.org/t/colorpicker-payload-sending-rgb-values-all-zero/53553>\
**Category:** Dashboard\
**Created:** [11 November 2021 08:29 UTC](https://discourse.nodered.org/t/colorpicker-payload-sending-rgb-values-all-zero/53553 "2021-11-11T08:29:06Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![Rocky48](https://avatars.discourse-cdn.com/v4/letter/r/cc9497/32.png) [@Rocky48](https://discourse.nodered.org/u/Rocky48)\
**Post date:** [11 November 2021 08:29 UTC](https://discourse.nodered.org/t/colorpicker-payload-sending-rgb-values-all-zero/53553/1 "2021-11-11T08:29:06Z")

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Hi

I tried to control my KNX RGB controller with colorpicker. When i check the values in the object sent to the KNX device it looks like:  
msg.payload:{red:0,green:0,blue:0}.

It does not matter what color i choose, it is all zero and the RGB light turns off.

I'm on nodeRed V2 beta, does anyone know what the problem is here?

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**Author:** ![Rocky48](https://avatars.discourse-cdn.com/v4/letter/r/cc9497/32.png) [@Rocky48](https://discourse.nodered.org/u/Rocky48)\
**Post date:** [30 November 2021 07:25 UTC](https://discourse.nodered.org/t/colorpicker-payload-sending-rgb-values-all-zero/53553/2 "2021-11-30T07:25:19Z")

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Just a quick follow up on this:  
I debugged the problem and found that the color picker sends:  
{r:123,g:123,b:123,a:0}  
But the KNX device expects:  
{red:123,green:123,blue:123}  
So i added an change node and moved the values in the object from r to red, g to green and so on and removed the "a:0" property (i don't know what this stands for?) from the object.  
Now the color picker works as expected

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**Author:** ![jbudd](https://avatars.discourse-cdn.com/v4/letter/j/5f8ce5/32.png) [@jbudd](https://discourse.nodered.org/u/jbudd)\
**Post date:** [30 November 2021 10:20 UTC](https://discourse.nodered.org/t/colorpicker-payload-sending-rgb-values-all-zero/53553/3 "2021-11-30T10:20:02Z")

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The a: is transparency (Alpha channel).

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**Author:** ![Rocky48](https://avatars.discourse-cdn.com/v4/letter/r/cc9497/32.png) [@Rocky48](https://discourse.nodered.org/u/Rocky48)\
**Post date:** [30 November 2021 10:37 UTC](https://discourse.nodered.org/t/colorpicker-payload-sending-rgb-values-all-zero/53553/4 "2021-11-30T10:37:29Z")

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Thanks for the clarification!

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**Author:** ![dceejay](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/dceejay/32/38_2.png) [@dceejay](https://discourse.nodered.org/u/dceejay)\
**Post date:** [30 November 2021 13:43 UTC](https://discourse.nodered.org/t/colorpicker-payload-sending-rgb-values-all-zero/53553/5 "2021-11-30T13:43:17Z")

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and goes from 0 -\> 1 (vs 0 -\> 255 for the r, g and b)

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**Author:** ![system](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/1X/d073cd938eafa2e558d7c2cd59003b3ef4963033.png) [@system](https://discourse.nodered.org/u/system)\
**Post date:** [30 December 2021 13:43 UTC](https://discourse.nodered.org/t/colorpicker-payload-sending-rgb-values-all-zero/53553/6 "2021-12-30T13:43:27Z")

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