Background blend mode

Default values

Classname key	CSS value
n	`normal`
m	`multiply`
s	`screen`
o	`overlay`
dn	`darken`
ln	`lighten`
cd	`color-dodge`
cb	`color-burn`
hl	`hard-light`
sl	`soft-light`
dif	`difference`
exc	`exclusion`
hue	`hue`
sat	`saturation`
c	`color`
l	`luminosity`