<'font-variation-settings'> = normal | [ <string> <number>]#
normal
None of the features are enabled.
<string>
A case-sensitive OpenType or TrueType variation axis name.
<number>
An integer or zero or more decimal digits followed by a dot (.) followed by one or more decimal digits. The first character may be preceded by a sign (- or +). The last character may be succeeded by an exponent (e or E) and an integer.