Identify dominant colors in an image

hex-colors.sh

#!/bin/sh

# CROP IMAGE INTO HD FORMAT 1080X720 FROM CENTRE
convert $1 -resize 1080x1080 resized-$1
convert resized-$1 -gravity center -crop 1080x720 cropped-$1

# GET FIVE MOST DOMINANT HEX COLORS FROM ANY IMAGE
convert cropped-$1 +dither -colors 5 -unique-colors txt: | awk '{ print $3 }' | grep '#' > hex.tmp

# CREATE A RECTANGLE FROM EACH HEX COLOR WITH HEX CODE AS TEXT IN THE MIDDLE
while read p; do
  convert -size 216x144 xc:$p rect-$p.png
  convert -background '#0008' -fill white -gravity center -size 216x30 caption:$p rect-$p.png +swap -gravity south -composite rect-$p.png
done <hex.tmp

# COMBINE RECTANGLES INTO ONE COMBINED IMAGE
convert +append rect-*.png combined.png

# APPEND COMBINED IMAGE BELOW THE ORIGINAL IMAGE
convert -append cropped-$1 combined.png $1-colors.jpg

# REMOVE TEMPORARY FILES
rm hex.tmp rect* cropped-$1 resized-$1 #combined.png