Thank you! I think I've narrowed down where this is coming from.
Other than this warning - is it interrupting your play at all?

To be honest this is only 1 of several dozens red error my modlist currently gives (Mostly compatibility patches relying on changed code from other mods that weren't properly updated to 1.6 I'd guess). So I haven't played a real playthrought yet, and couldn't say if this mod was causing any actual any issue lol.

So after more investigation, this is caused because the vanilla game doesn't handle colorTwo being set to a non-white color. I'm not doing any coloring on objects in the game, so the error is being thrown due to one of your other mods. It's a benign error so you can safely ignore it. At best the other mod author IS doing things correctly and the game is logging a hard-coded warning anyway, and at worst the game is just ignoring the other mod author's color choices and using vanilla behavior.
If you are able to figure out which mod is causing it - you could tell the mod author the error is caused because they are setting colorTwo on a Graphic_Random object to a non-white color, and vanilla automatically checks for that exact condition and logs an error if its true.

I did a folder wide search of my mod list and found 760 instances of colortwo to a non-white color. in dozens of mods. So maybe there is a proper way to do this and that one instance did it wrong... In any case, thanks you for looking into this even if your mod wasn't at fault.

The error is for Graphic_Random objects. Other types of objects are fine having their colorTwo set to a non-white color.

Yeaah, after I checked colortwo I also checked that one and had a few thousands hit. But since you said it was benign I decided that I would save myself a few hours and headache and wait until I saw an actual in-game problem as I'm not sure I can filter these search efficiently to find any linked to colortwo and I ain't going to open each of these thousand of result by hand lol.

No kidding. As long as the error doesn't keep popping up incessantly (annoying) you should be good. The reason my mod made it noticeable is because it forces a redraw every time the sun rotates 90 degrees (2D plane) in order to prevent shadows from overlapping incorrectly. So while that doesn't cause the error, it does make it more noticeable as it will repeat instead of just happening once on map load.

Game's now freaking out when taking off in the gravship
```Exception from long event: System.NullReferenceException: Object reference not set to an instance of an object
[Ref 7F61430A]
at PipeSystem.PipeNetManager.UnregisterConnector (PipeSystem.CompResource comp) [0x000ce] in <51e70c54d3a74897b386f0d6bd1f0d95>:0
at PipeSystem.CompResource.PostDeSpawn (Verse.Map map, Verse.DestroyMode mode) [0x00007] in <51e70c54d3a74897b386f0d6bd1f0d95>:0
at PipeSystem.CompPipeValve.PostDeSpawn (Verse.Map map, Verse.DestroyMode mode) [0x00001] in <51e70c54d3a74897b386f0d6bd1f0d95>:0
at Verse.ThingWithComps.DeSpawn (Verse.DestroyMode mode) [0x00032] in <d2f9716cc2ac4cda9c2a174cc147bf37>:0
- PREFIX realtiltmod: Void RealTiltMod.Patch_SunLamp_DeSpawn:Prefix(ThingWithComps __instance)
at Verse.Building.DeSpawn (Verse.DestroyMode mode) [0x0000e] in <d2f9716cc2ac4cda9c2a174cc147bf37>:0
at RimWorld.GravshipUtility.GenerateGravship (RimWorld.Building_GravEngine engine) [0x000ae] in <d2f9716cc2ac4cda9c2a174cc147bf37>:0
at Verse.WorldComponent_GravshipController.RemoveGravshipFromMap (RimWorld.Building_GravEngine engine) [0x00014] in <d2f9716cc2ac4cda9c2a174cc147bf37>:0
at Verse.WorldComponent_GravshipController+<>c__DisplayClass43_0.<OnGravshipCaptureComplete>b__2 () [0x00060] in <d2f9716cc2ac4cda9c2a174cc147bf37>:0
at Verse.LongEventHandler.UpdateCurrentSynchronousEvent (System.Boolean& sceneChanged) [0x0001d] in <d2f9716cc2ac4cda9c2a174cc147bf37>:0
UnityEngine.StackTraceUtility:ExtractStackTrace ()
(wrapper dynamic-method) MonoMod.Utils.DynamicMethodDefinition:Verse.Log.Error_Patch1 (string)
Verse.LongEventHandler:UpdateCurrentSynchronousEvent (bool&)
Verse.LongEventHandler:LongEventsUpdate (bool&)
(wrapper dynamic-method) MonoMod.Utils.DynamicMethodDefinition:Verse.Root.Update_Patch1 (Verse.Root)
Verse.Root_Play:Update ()
```

Do you have the latest version of the mod? (4.3 - can find it in mod settings under "show Changelog Popup again").
I removed that method in the last hotfix - so it shouldn't even exist.