Fix default sample code in customize.html (#1431)
Fix default sample code in customize.html (#1431)

Actually, the default code will result in an unexepected behavior: the `$color` map is defined in `derived-variables.sass` before setting the custom colors.

IMHO the lists and maps should be defined in a dedicated sass file to avoid confusion in customisation.
jgthms/bulma,jgthms/bulma,cwonrails/bulma