You can create any color by defining the HSL (Hue, Saturation, Lightness) values for it. See also the related wikipedia article for some description.
RGB ColorTemp
The three RGB ColorTemp helpers are made to convert a user supplied value into some color from a color-spectrum of two values. Usually this spectrum is ranging from red (HSL[0, 100%, 50%]) to blue (HSL[250,100%, 50%]), from warm to cold.
The three different helpers are really similar. The first one only receives the percentage of the maximum hue value (250 for blue). Based on this supplied value you will get some color between red and blue.
The second helper lets you define the minimum and maximum values of the value you are going to supply. These ranges can also be negative, therefore you can for instance give -5 as minimum, 30 as maximum for your usual temperature display.
With the last helper you can additionally define the ending colors of the spectrum you are going to use. This way you can use blue to red for temperatures, but also green to red for network speeds and the like.
I couldn’t find the “right” way to update the librairies so I’ve edited directly the 6 blocky librairies one by one in Development –> Blocky Libraries.
And following your comment in Parameters → Scripts, I’ve opened all my nspanel_xxx scripts and when you do that, you have a popup saying your script has been saved using an old script and that you should save it. Which I did.
Now however I see these messages in the log:
2026-04-12 10:11:01.089 [INFO ] [.script.ui.nspanel_updateScreensaver] - HSL[157 91 47] -> #0aea97
2026-04-12 10:11:41.831 [WARN ] [ity.CommunityMarketplaceAddonService] - Unable to retrieve marketplace add-ons: java.lang.IllegalStateException: Expected a string but was BEGIN_OBJECT at line 1 column 21120 path $.topic_list.topics[1].tags[0]
2026-04-12 10:12:03.089 [ERROR] [e.automation.internal.RuleEngineImpl] - Failed to execute rule ‘nspanel_updateScreensaver' with status 'INITIALIZING'
2026-04-12 10:16:22.646 [ERROR] [.script.ui.nspanel_updateScreensaver] - missing context for loading 'absorb_it_nspanel_weatherupdate' in 'nspanel_updateScreensaver', try 'NSPanel Item' from Helpers library!
2026-04-12 10:16:22.651 [ERROR] [.script.ui.nspanel_updateScreensaver] - missing context for loading 'absorb_it_nspanel_status' in 'nspanel_updateScreensaver', try 'NSPanel Item' from Helpers library!
Ignore my comment, I guess I tried to run it directly.
I had to open also my callback script and save it back.
–> no more HSL message in the logs
I still wonder what the message about marketplace means ?
It means that you’re running a version of OH that supports “the old forum”. The forum was upgraded, which changed the format of what the forum exports so that OH had to be adapted to the new format. I made a fix, but I think it was only backported to 5.1.3 and 4.3.10, despite me trying to suggest otherwise. So if you’re running 5.0.x or a previous 3.x or 4.x version, the community marketplace is permanently dead.
