Game keeps changing my sims hair colour.

Mods? Generally mods, not one mod used on one sim.
Remove them.

You may not be using any CC for him but it does not mean his sim is not affected by the CC his parents may have. Genetics could be part of the issue seeing the programming is already in that sim to grow up and possibly have the same things his parents have. Like if they have CC hair - the game is compelled to give the kids the same genetic compounds like hair and eye color the parents have - but if there is no CC hair in that CC for kids - then the game is just going to keep changing your sims hair as it cannot match the parents hair and is programmed to match it.

The game programming does not change just because you use CC on some of your sims. But you do have to keep in mind eye color, hair color, etc in kids needs to match one or the other parent. Means if they have CC hair you need the same color version of CC hair for the kids or take the games constant switching of the kids hairs like that and just have to change it back constantly yourself.

You cannot go by how Sims 3 worked as it had a palette of colors to mix and match any CC hair - Sims 4 does not have that or the programming to do such things. Your game can only do what it is programmed to do.

I have this same problem with my little girl sim. The game keeps giving her blonde hair when she changes clothes. I don't have any mods.

I had the same problem on one Sim. What fixed it for me was going into full edit mode and altering the hair colors there. Didn't have a problem after that. Perhaps changing haircolors via "change appearance" doesn't make it permanent.

To go into full edit mode (basically taking you back to CAS but giving you full edit capabilities):

• Open the console (press Control+Shift+C)
  
• Type "testingcheats on" and press Enter (some people have to type "testingcheats true"). DO leave the space, but don't type the quotation marks.
  
• You should see a message saying cheats are now enabled (if not, try the "true" version)
  
• Type "cas.fulleditmode" (again, no quotation marks) and press Enter
  
• Shift-Click on the affected Sim and select the following option: Modify in CAS.
  

This should take you to the version of CAS where you can edit/change everything: physical, Aspirations, traits, cosmetics, whatever.

When you're done and back in your game, some say it's adviseable to manually turn testingcheats off (although others say testingcheats automatically turns off the next time you encounter a loading screen). I don't know for sure which works -- I turn them off manually now, just to be on the safe side.

Hope that helps! Good luck :).

______________________________________________________

Edited to reflect that it is definitely a Shift-Click on the Sim and to specify the option's name "Modify in CAS"

Everyone is so quick to blame mods. I'd guess it's a game bug unless everyone has the same mods in their game. I've had the same issue crop up in my game and I have maybe two mods. Also there are issues with hair color and genetics I've had crop up prior to using mods.

It's not blaming on mods - the "remove mods" there means de facto "try without mods first".

Besides, mods and removing mods won't kill relationships. CAS cheat will.

"JoxerTM22;12937219" wrote:
It's not blaming on mods - the "remove mods" there means de facto "try without mods first".

Besides, mods and removing mods won't kill relationships. CAS cheat will.

I was not aware of that. Thank you for adding the caveat.

I don't use mods or CC (never have) and the Sim I used this solution on was a first generation Sim. As I said, this is what worked for me. It may not be a universal solution, particularly if if alters relationships that are important to the player. But I thought it might be helpful to offer it as a possibility.

"JoxerTM22;12937219" wrote:
It's not blaming on mods - the "remove mods" there means de facto "try without mods first".

Besides, mods and removing mods won't kill relationships. CAS cheat will.

From what I understand, it only kills relationships if you age someone up. I've used it plenty of times (without aging anyone) to make little tweaks like this (or adding a plum tattoo!) without any adverse relationship effects.

I don't see this issue being mod related as I didn't start having this issue at all until I downloaded the last patch and the Get to Work expansion. Now, all my little girls hair is constantly changing It's so aggravating. I never had this issue before with all of my CC until now that the patch/Get to Work are out.

"killuhbeee;13512556" wrote:
I don't see this issue being mod related as I didn't start having this issue at all until I downloaded the last patch and the Get to Work expansion. Now, all my little girls hair is constantly changing It's so aggravating. I never had this issue before with all of my CC until now that the patch/Get to Work are out.

The March 26 patch changed coding in a way that affected a lot of earlier CC. Hair, eyebrow, and skin CC appear to be especially affected.