Get rid of side line

[karambaq]

How can I disable this side grey line on the left? Or change it's color?

[LangLangBart]

# set 'bg' and 'gutter' color alike
fzf --color gutter:green,bg:green

• ref: allow NONE color #3359 (9/Jul/23)
• ref: man fzf

       --color=[BASE_SCHEME][,COLOR_NAME[:ANSI_COLOR][:ANSI_ATTRIBUTES]]...
              Color configuration. The name of the base color scheme is followed by custom color mappings.

              BASE SCHEME:
                  (default: dark on 256-color terminal, otherwise 16)

                  dark    Color scheme for dark 256-color terminal
                  light   Color scheme for light 256-color terminal
                  16      Color scheme for 16-color terminal
                  bw      No colors (equivalent to --no-color)

              COLOR NAMES:
                  fg                  Text
                    preview-fg        Preview window text
                  bg                  Background
                    preview-bg        Preview window background
                  hl                  Highlighted substrings
                  fg+                 Text (current line)
                  bg+                 Background (current line)
                    gutter            Gutter on the left
                  hl+                 Highlighted substrings (current line)
                  ...

[junegunn]

You can use -1 to make fzf use the default background color. i.e. fzf --color gutter:-1