Search Atom packages.

gutter-shadow

Add a shadow when editor is scrolled away from the gutter
dsandstrom
1,939

toggle-gutter

Quickly toggle visability of Atom's gutters
MaximSokolov
3,176

chromo-color-previews

Displays color previews for hex, rgb(a), hsl(a), named colors, gradients, and all 255 ansi color codes in the gutter as colored pills.
Vertagon-Softworks
1,682