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printf in shell script can't do \x%x
where ECHO-VAR produces \xFF\xFF\xFF\x00 ($fb_COLOR15) these work on the command line:
CP="`ECHO-VAR`" printf $CP | dd status=none bs=4 count=$(( ( 1360 * 100 ) + 100 )) > /dev/fb0
printf "`ECHO-...
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