Mine is a thin white line (despite being a very bad c/s & major infection afterwards) but Luke is almost 12yrs so can't really remember when it went from pink to white... sorry

It hasn't seemed to have changed at all this pregnancy - although being almost 23 weeks along, I have to look in the mirror now to see it at all

The only odd thing I have encountered (that hasn't been as issue until I got pregnant & grew) was some ingrown hairs along the bottom of the scar.
Not painful at all but definately lumps I could feel.

That happened when I was about 12 weeks, but haven't had any for a while now.
Maybe a random thing for just me and nothing to do with your original question, but its the only thing I've noticed to be a little weird with the scar & this pregnancy.