Things seem to be working correctly for this change in IM 6.5.6-6 Q16 beta.
# txt: is producing hue now in percent
# HSL
convert colorswatch.png -scale 1x1! -colorspace HSL txt:-# ImageMagick pixel enumeration: 1,1,65535,hsl
0,0: ( 2299,34588,56283) #08FB871CDBDB hsl(3.50805%,52.7779%,85.8824%)
# HSB
convert colorswatch.png -scale 1x1! -colorspace HSB txt:-# ImageMagick pixel enumeration: 1,1,65535,hsb
0,0: ( 2299,10464,61166) #08FB28E0EEEE hsb(3.50805%,15.967%,93.3333%)
#Each of these produces the correct result.
# percent HSL
convert -size 100x100 xc:"hsl(3.50877%,52.7779%,85.8824%)" colorswatch_hsl7a.png
# raw HSL (H 0-360, S,L 0-255)
convert -size 100x100 xc:"hsl(12.6316,134.5836,219.0001)" colorswatch_hsl7b.png
#Each of these produces the correct result.
# percent HSB
convert -size 100x100 xc:"hsb(3.50877%,15.967%,93.3333%)" colorswatch_hsb7a.png
# raw HSB (H 0-360, S,B 0-255)
convert -size 100x100 xc:"hsb(12.6316,40.7159,237.9999)" colorswatch_hsb7b.png
#Each of these correctly produces pure green
# percent HSL
convert -size 100x100 xc:"hsl(33.333%, 100%, 50%)" show:
# raw HSL
convert -size 100x100 xc:"hsl(120, 255, 127)" show:
# percent HSB
convert -size 100x100 xc:"hsb(33.333%, 100%, 100%)" show:
#raw HSB
convert -size 100x100 xc:"hsb(120, 255, 255)" show:
I have modified the color.php page to reflect these changes.