Specifying colors
Named colors
When using colors in CSS we can use named colors or we can be explicit with rgb(0,100,255).
RGB/RGBA
We can also use rgba, which is like rgb but it includes a fourth argument called alpha channel with a value range of 0-1.
On 0, rgba will be transparent.
Additionally, we can use hexadecimal values with #000000 for black and #FFFFFF for white.
Note that for hex we can shorthand the values by using pairs: #FFFFFF == #FFF.
HSL
Hue, Saturation, Lightness
Decent color combinations:
Not quite black: #333
Can also look at Coolors