Monokai theme. When I start
helm, the current selected line are highlighted in gray. It's not easy to spot,especially with the title information in blue.
How can I change this gray highlight, say, in purple?
The name of the face helm uses to highlight the selected item is
helm-selection. You can change just the background color of any face with
(set-background-color 'helm-selection "purple"). You can also use
set-face-attribute like this:
(set-face-attribute 'helm-selection nil :background "purple" :foreground "black")
if you also want to set other attributes at the same time.