Close but not quite

input

[Background]
Bold=false
Color=0,0,0

[BackgroundIntense]
Bold=false
Color=104,104,104

[Color0]
Bold=false
Color=0,0,0


[Color0Intense]
Bold=false
Color=104,104,104


[Color1]
Bold=false
Color=178,24,24


[Color1Intense]
Bold=false
Color=255,84,84


[Color2]
Bold=false
Color=24,178,24


[Color2Intense]
Bold=false
Color=84,255,84


[Color3]
Bold=false
Color=178,104,24


[Color3Intense]
Bold=false
Color=255,255,84


[Color4]
Bold=false
Color=24,24,178


[Color4Intense]
Bold=false
Color=84,84,255


[Color5]
Bold=false
Color=178,24,178


[Color5Intense]
Bold=false
Color=255,84,255


[Color6]
Bold=false
Color=24,178,178


[Color6Intense]
Bold=false
Color=84,255,255


[Color7]
Bold=false
Color=178,178,178


[Color7Intense]
Bold=false
Color=255,255,255


[Foreground]
Bold=false
Color=178,178,178


[ForegroundIntense]
Bold=false
Color=255,255,255


[General]
Description=Linux Colors

konsole2urxvt

#!/usr/bin/env bash

declare -l x

while read -r x; do
    if [[ $x =~ ^\[([[:alpha:]]*)([[:digit:]])?(intense)?\]$ ]]; then
        until [[ ! $x ]]; do
            read -ru0 x;
            if [[ $x == color* ]]; then
                IFS=, read -ra x <<< "${x##*=}"
                printf 'URxvt.%s:#%0.2x%0.2x%0.2x\n' "${BASH_REMATCH[1]}$(( z=(! ${#BASH_REMATCH[2]} ? -1 : ${#BASH_REMATCH[3]} ? BASH_REMATCH[2] + 8 : BASH_REMATCH[2]) ))" "${x[@]}"
            fi
        done
    fi
done

# vim: set fenc=utf-8 ff=unix ts=4 sts=4 sw=4 ft=sh nowrap et:

output

~/doc/projects/bash $ ./konsole2urxvt < /usr/share/apps/konsole/Linux.colorscheme
e
URxvt.background-1:#000000
URxvt.backgroundintense-1:#686868
URxvt.color0:#000000
URxvt.color8:#686868
URxvt.color1:#b21818
URxvt.color9:#ff5454
URxvt.color2:#18b218
URxvt.color10:#54ff54
URxvt.color3:#b26818
URxvt.color11:#ffff54
URxvt.color4:#1818b2
URxvt.color12:#5454ff
URxvt.color5:#b218b2
URxvt.color13:#ff54ff
URxvt.color6:#18b2b2
URxvt.color14:#54ffff
URxvt.color7:#b2b2b2
URxvt.color15:#ffffff
URxvt.foreground-1:#b2b2b2
URxvt.foregroundintense-1:#ffffff