Feature Request: Change the color of the Mark symbol (arrow)

[kurisutofu]

Hi,
The current symbol used for marked lines, the purple arrow, does not standout easily out of the list of matches.
Can we get the ability to change its color?

Here is an example from glogg to illustrate how better it pops out:

[nowhszh]

Purple arrow indicates a marks and matches
Blue arrow indicates marks

[kurisutofu]

Purple arrow indicates a marks and matches Blue arrow indicates marks

In fact, I just saw a blue arrow for the first time after posting the feature request.
I think it would still be nice to be able to change the color of the purple arrow as it's not easy to see it when scrolling.