HSL colours

External refs:

• http://www.css3.info/preview/hsl/
• http://www.css3.info/preview/hsla/

This is HSL(0,50%,50%)

This is HSL(50,50%,50%)

This is HSL(100,50%,50%)

This is HSL(150,50,50)

This is HSL(200,50,50)

This is HSL(250,50,50)

This is HSL(300,50,50)

This is HSL(350,50,50)