Reno: colors

All colors $reno-color- are completely opaque. All grays $reno-gray- are black color with different opacity.

Brand colors

CSS variables
`$reno-color-primary`
`$reno-color-secondary`
`$reno-color-tertiary`
`$reno-color-success`
`$reno-color-alert`
`$reno-color-error`

Grays

CSS variables
`$reno-color-black`
`$reno-color-black`	`$reno-gray-dark`
`$reno-color-medium-dark-gray`	`$reno-gray-medium-dark`
`$reno-color-medium-light-gray`	`$reno-gray-medium-light`
`$reno-color-light-gray`	`$reno-gray-light`
`$reno-color-super-light-gray`	`$reno-gray-super-light`
`$reno-color-dirty-white`
`$reno-color-white`