53 lines
935 B
Bash
Executable file
53 lines
935 B
Bash
Executable file
#!/usr/bin/env bash
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# Prompt user for hex value
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echo -n "Enter hex color code: "
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read hex
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# Convert hex to RGB
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r=$((16#${hex:1:2}))
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g=$((16#${hex:3:2}))
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b=$((16#${hex:5:2}))
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# Convert RGB to HSL
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r=$((r/255))
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g=$((g/255))
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b=$((b/255))
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max=${r}
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min=${r}
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if [[ ${g} -gt ${max} ]]; then max=${g}; fi
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if [[ ${b} -gt ${max} ]]; then max=${b}; fi
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if [[ ${g} -lt ${min} ]]; then min=${g}; fi
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if [[ ${b} -lt ${min} ]]; then min=${b}; fi
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l=$(((max+min)/2))
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if [[ ${max} == ${min} ]]; then
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h=0
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s=0
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else
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d=$((max-min))
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if [[ $(awk "BEGIN {print (${l} > 0.5)}") -eq 1 ]]; then
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s=$((d/(2-max-min)))
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else
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s=$((d/(max+min)))
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fi
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case ${max} in
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${r}) h=$(((g-b)/d))
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if [[ ${h} -lt 0 ]]; then h=$((h+6)); fi
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;;
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${g}) h=$((2+(b-r)/d))
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;;
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${b}) h=$((4+(r-g)/d))
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;;
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esac
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h=$((h*60))
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fi
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# Assign alpha value (default is 1.0)
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a=1.0
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# Output HSLA values
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echo ${h} ${s} ${l} ${a}
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