# File lib/color/rgb.rb, line 247
247:   def adjust_brightness(percent)
248:     percent /= 100.0
249:     percent += 1.0
250:     percent  = [ percent, 2.0 ].min
251:     percent  = [ 0.0, percent ].max
252: 
253:     hsl      = to_hsl
254:     hsl.l   *= percent
255:     hsl.to_rgb
256:   end