modifying the faces of outputs

[ibichka]

I am setting

(setq helm-ag-base-command "ag --nocolor --nogroup --colors=match:fg:magenta --colors=line:bg:yellow)

in order to change the faces of the outputs so I can spot better the found query.
I don't seem to be able to manage with the above specifications. They seem to be overriden by the default ones. Thanks in advance!

[Shohei YOSHIDA]

;; for file name
(set-face-attribute 'helm-moccur-buffer nil
		    :foreground "pink")

;; for line
(set-face-attribute 'helm-grep-lineno nil
		    :background "yellow")

;; for matched text
(set-face-attribute 'helm-match nil
		    :foreground "magenta")

[ibichka]

Thanks! I suppose --colors=match:fg:magenta --colors=line:bg:yellow would only work as a terminal command. I wouldn't have known how to find the face-attributes.