Function: readColorRef()

readColorRef(colorEl, ctx): ColorRef

Read a colour element into a ColorRef.

Parameters

Parameter	Type	Description
`colorEl`	`Element` \| `null`	an `a:EG_ColorChoice` element, or `null` for no colour
`ctx`	`ColorContext` \| `null`	the theme to resolve against, or `null` to leave ColorRef.resolved unset