Farzanah
I think dyed hair over 70 can be aging if dark, especially reddish brown. Blond tends to look softer. It’s difficult for hair to look healthy and shiny if constantly dyed.
It’s still possible to look “presentable” without dyed hair, but can take a bit of getting used to if you have coloured it for a long time, and have an entrenched negative vision of what older women look like without dyed hair.
As you get older you lighten the colour of the hair colour you use. I showed my hair dresser a photo of me taken in my 50s , before I started to go grey, and he commented on how dark my original hair colour was.
I come from a family where we go grey very late in life and in a very messy way, from the outside in, so in my 80s while the hair on the crown of my head head has faded in colour a bit, it is still dark brown, while all round the edges it is grey/white.
I have a photo of one of my uncle taken just before he died in his late 80s, and the crown of his hair is still as dark as it ever was, surrounded by all this grey/white hair. It doesn't look good on a man either.
Both my daughter and grand daughter are under strict instructions to let me know when my hair colour no longer looks good with my face colour.
My hair still has a natural sheen, mainly because until recently I have only been using dye on it 2 or 3 times a year, although I use it more frequently now. I have often looked at women with dull lifeless looking dyed hair and wondered how that happened. Now I know.