Sphynx fuzz colour change

[SphynxMama97]

Hello all!
I'm happy to be here as a new member to this community. I have two Sphynx (boy & girl).
The boy as he's gotten older has not only accumulated what looks like reverse age spots (white or pink instead of dark on head and neck) as well as his forehead fuzz has changed from dark to what almost looks like blonde. Are these age signs? Or are they something that indicate something to be seriously concerned about.
Thanks!!

 

[Catzzzmeow]

If you can share pics it helps.

 

[SphynxMama97]

I'm sending some pics now.

See the spots on his back? And the blondish light fuzz in the furrow...hope these help Thanks

 

[Catzzzmeow]

It’s often just changes in pigmentation. Our black girl has some darker and some lighter spots. It increases in Warner months when she hangs in the windows even more.

 

[Toa and Ross]

I agree with @Catzzzmeow it's probably pigmentation. My grey girl Jade has some lighter spots too. What a handsome boy btw