www.nico.schottelius.org/blog/change-colour-for-ls-to-work-with-bright-terminal-background.mdwn

[[!meta title="How to change the colour of ls to work with bright terminal backgrounds"]]

## Introduction

I am using [rxvt-unicode](http://software.schmorp.de/pkg/rxvt-unicode.html)
as my terminal and prefer to use a bright background due to better
readability in the sun.

I have tried various colour themes
(including
[solarized](http://ethanschoonover.com/solarized) and
[solarized-light](https://github.com/yangzetian/xresources-color-solarized-light),
but was never satisfied, because of changes
they make to existing colour configurations for applications
like mutt, alot or irssi.

I am essentially using black as the foreground colour and
LightYellow2 as the background colour at the moment (which I inherit
from some very old xterm + [[!fvwm]]2 settings).

## Motivation

The problem with my current setup is that symbolic links are
show in **cyan** by ***ls*** on my system and thus are pretty much
unreadable, as you can see:

[[!img urxvt-before.png alt="urxvt with unreadable cyan colour"]]

## The solution

As the problem mainly arises by the use of ls, I initially thought
about modifying the **LS_COLORS** variable. However, as I frequently
login to servers that are variable does not effect the colour output 
on the servers (and modifying AcceptEnv on all servers is also not
realistic).

As I do not want to have cyan output on my LightYellow2 background
at all, I thought about changing the colour cyan to black.

I found a nice colour table on [[!gentoowiki Rxvt-unicode#Color_theme]],
with description of colour number to name:

    !black
    *color0:  #251f1f
    *color8:  #5e5e5e
    !red
    *color1:  #eb4509
    *color9:  #eb4509
    !green
    *color2:  #94e76b
    *color10: #95e76b
    !yellow
    *color3:  #ffac18
    *color11: #ffac18
    !blue
    *color4:  #46aede
    *color12: #46aede
    !magenta
    *color5:  #e32c57
    *color13: #e32c57
    !cyan
    *color6:  #d6dbac
    *color14: #d6dbac
    !white
    *color7:  #efefef
    *color15: #efefef


## The result

So in the end, only the following entries in .Xresources are
required to make cyan symbolic links readable by changing
cyan to black:

    URxvt.background: LightYellow2
    URxvt.foreground: black
    URxvt.color6: black
    URxvt.color14: black

And this is how it finally looks like:

[[!img urxvt-after.png alt="urxvt with cyan changed to black"]]

## SEE ALSO

* [Terminal Colours](http://ciembor.github.io/4bit/)
* [[!archwiki X_resources]]
* [[!archwiki Rxvt-unicode]]

[[!tag terminal unix urxvt]]