RGB color notation to HEX and reverse using Awk

hexToRgb.awk

#!/bin/awk -f

# Convert awk hex colors to rgb values using awk.
# input line:     #000000
# output line:    rgb(0,0,0)

{
	number = substr($1, 2)
	for (i = 1; i <= 3; i++) {
		idx = (i - 1)*2 + 1
		hexStr = "0x" substr(number, idx, 2)
		rgb[i] = strtonum(hexStr)
	}
	printf("rgb(%d,%d,%d)\n", rgb[1], rgb[2], rgb[3])
}

rgbToHex.awk

#!/bin/awk -f

# Convert awk rgb colors to hex values using awk.
# input line:      rgb(0,0,0)
# output line:     #000000

BEGIN { FS="[(),]" }

/rgb/ {
	printf("#%.2x%.2x%.2x\n",$2,$3,$4) 
}

Hi, thanks for your code. Anyway I found a small bug in hexTorgb.awk:

printf("rgb(%d,%d,%d)\n",rgb[1], rgb[2], rgb[3])

should be

printf( "%d,%d,%d", strtonum( rgb[1] ), strtonum( rgb[2] ), strtonum( rgb[3] ) )

unless awk will not recognise rgb[i] as a number but as a string and it will always print 0,0,0.

Hello @Clockris, thanks for telling me! Fixed 👍