Make transparent colors with HSLA
hsla(9, 100%, 64%, 0)
hsla(9, 100%, 64%, 0.2)
hsla(9, 100%, 64%, 0.4)
hsla(9, 100%, 64%, 0.6)
hsla(9, 100%, 64%, 0.8)
hsla(9, 100%, 64%, 1)
The inline styles used on this page
<h2 style="background-color:hsla(9, 100%, 64%, 0);">
<h2 style="background-color:hsla(9, 100%, 64%, 0.2);">
<h2 style="background-color:hsla(9, 100%, 64%, 0.4);">
<h2 style="background-color:hsla(9, 100%, 64%, 0.6);">
<h2 style="background-color:hsla(9, 100%, 64%, 0.8);">
<h2 style="background-color:hsla(9, 100%, 64%, 1);">