Optional
Text color in CSS format: hex (#RRGGBB or #RRGGBBAA), rgb(r,g,b), rgba(r,g,b,a), or named colors
Font configuration
URL to a font file in TrueType (.ttf), OpenType (.otf), WOFF (.woff), or WOFF2 (.woff2) format
Font size in points (pt)
Text color in CSS format: hex (#RRGGBB or #RRGGBBAA), rgb(r,g,b), rgba(r,g,b,a), or named colors