For those getting the error:
./install.sh: line 157: kde-cp: command not found

Open the install.sh file in a text editor and find and replace all instances of "kde-cp" with "kdecp5".
Doing that got it to install correctly for me.

10 10 the best

some colors (like magenta, violet, brown) don't work properly (the default folder colour doesn't change at all).. I run KDE Plasma 5

I've got this error when running install.sh on Fedora 29:

./install.sh: line 157: kde-cp: command not found

9 +

Gracias, funciona perfectamente en Kubuntu 18.04 con Dolphin 17.12.3 y KDE 5.

Does not work with latest KDE Neon.

9 so damn convenient it makes me laugh! thanks for the effort!

I wasn't able to install this on KDE Neon with Plasma 5.9.3
There seemed to be "old" commands in the install.sh (geometry and cation).
I edited the install.sh and it worked ...
this is my new version:

#!/bin/bash

# Copyright (C) 2014 Smith AR
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see .
#
#
# INSTALL: Only run this script

shopt -s extglob
shopt -s expand_aliases
shopt -s extdebug

cd $(dirname $0)

${exit:=$1}
exit=${exit:-"continue"}

declare title='Folder Color'
declare user=$(basename $HOME)
declare combobox0=('⚫ Select your version of Dolphin:' 'Plasma 5' 'KDE4')
declare combobox1=('⚫ Install on:' 'root' $user)
declare rect='330x130'
declare prefix='/usr'

declare foldercolorDE='dolphin-folder-color.desktop'
declare foldercolorSH='dolphin-folder-color.sh'
declare pathService='ServiceMenus'
declare pathExec='/usr/bin'

setPathSH() {
export tmp='.tmp'
pattern='dolphin-folder-color\.sh'
str="$pathExec/$foldercolorSH"
str=${str//+(\/)/\\/}
sed "s/$pattern/$str/" $foldercolorDE > $tmp
}

mk_directory() {
if ! [ -e $1 ] ; then
mkdir "$1"
fi
}

authorize() {
if [ `which kdesu` ] ; then
kdesu -i folder-red -n -d -c $0 finish "$choice" & disown -h
elif [ `which kdesudo` ] ; then
kdesudo -i folder-red -n -d -c $0 finish "$choice" & disown -h
else
kdialog --title ' ' --title dolphin-folder-color --error 'kdesu not found.'
exit 1
fi
}

if [ $exit == 'continue' ] ; then
choice=$(kdialog --title Dolphin \
--title "$title" \
--combobox "${combobox0[@]}" \
--default "${combobox0[1]}")
else
choice=$2
fi


if [ -z "$choice" ]
then exit 0
elif [ "$choice" == "Plasma 5" ] ; then
foldercolorDE='plasma5-folder-color.desktop'
pathService=""

export kde_config_services=`kf5-config --path services`
else
export kde_config_services=`kde4-config --path services`
fi

if [ $exit != "finish" ] && [ $UID != 0 ] ; then
kdg=$(kdialog --title Dolphin \
--title "$title" \
--combobox "${combobox1[@]}" \
--default $user)

if [ -z "$kdg" ]
then exit 0
elif [[ "$kdg" = "$user" ]]
then prefix=$HOME
fi
fi


if [[ $prefix = '/usr' ]] ; then
declare -r RootInstall=true
else
declare -r RootInstall=false
fi

chmod +x ./$foldercolorSH
chmod +x ./$foldercolorDE

succesInstall=true
if $RootInstall ; then
if [[ $UID != 0 ]] ; then
authorize
exit
else
IFS=":"

for p in $kde_config_services ; do
if [ -z ${p/\/usr\/*/} ] ; then
pathService="$p/$pathService"
fi
done

setPathSH
mk_directory $pathService
mk_directory $pathExec

kde-cp --overwrite ./$foldercolorSH "$pathExec/$foldercolorSH"
kde-cp --overwrite ./$tmp "$pathService/$foldercolorDE"

if [ $? != 0 ] ; then
succesInstall=false
fi

rm -r $tmp
fi
else
IFS=":"

for p in $kde_config_services ; do
if ! [ -d "$p" ]
then mkdir "$p"
fi
if [ -w "$p" ] ; then
pathService="$p/$pathService"
pathExec="$pathService"
break
fi
done

setPathSH
mk_directory $pathService

kde-cp --overwrite ./$foldercolorSH "$pathService/$foldercolorSH"
kde-cp --overwrite ./$tmp "$pathService/$foldercolorDE"
if [[ $? != 0 ]] ; then
succesInstall=false
fi
rm $tmp
fi

if $succesInstall ; then
msg="Installed successfully.
\nPlease restart Dolphin to update the Service Menus."
else
msg="Installation failed!"
fi
kdialog --title Dolphin --title "$title" --msgbox "$msg"

ok. installation worked but the file dolphin-folder-color.sh can't be found ...
maybe the path changed...

I use this from UbuntuStudio 14.04. Now I install 15.10, I chose the option for KDE 4 that is for dolphin4 that come in repositories, Very great job. God Bless

Thank you very much! :)
I'm an atheist, not bless me

La instalación fué bien después de haber instalado kdialog, pero la opción de color no aparece en las carpetas.

Kubuntu 15.04
KDE PLasma 5.2.2
Qt 5.4.1
Kernel 3.19.0-31-generic
SO 64 bits

Lo revisare de nuevo :(, al parecer algunos usuarios usan Plasma5 con dolphin de KDE4 y eso es un problema para mi. Podrias decirme tu version Dolphin. Desde la terminal: $ dolphin --version

Qt: 4.8.6
Plataforma de desarrollo de KDE: 4.14.6
Dolphin: 14.12.3

¿Hay alguna manera para solucionarlo o tengo que actualizar mi versión de Dolphin? Si es así dime como podría hacerlo.

Prueba esta y me comentas si te funciona.
https://github.com/audoban/dolphin-folder-color/archive/master.zip

¡Éste sí funciona! ¡Muchas gracias!

install successfull but not working.
arch linux, plasma-desktop 5.2.1-2

tell me please, what is your version of Dolphin?
The dolphin-folder-color appears in the contextual menu of dolphin?

$ dolphin --version
$ kiconfinder --version
$ kf5-config --path data
$ kf5-config --path services

~  dolphin --version
Qt: 4.8.6
KDE Development Platform: 4.14.6
Dolphin: 14.12.3
~  kiconfinder --version
Qt: 4.8.6
KDE Development Platform: 4.14.6
Icon Finder: 4.14.6
~  kf5-config --path data
/home/roland/.local/share/:/usr/share/:/usr/local/share/
~  kf5-config --path services
/home/roland/.local/share/kservices5/:/usr/share/kservices5/

Thanks a lot, I already know what's going on.

Hi
I run install.sh script in manjaro linux successful but when I close dophin and open it again nothing happen

which version of kde do you use?

Simple, útil y funcional, gracias por el proyecto :D