Rainbow Banner

Rainbow banner is disabled by default. Enabling it will make it appear every June:

rainbow_banner: true
rainbow_banner_colors:
  - '#e50000'
  - '#ff8d00'
  - '#ffee00'
  - '#008121'
  - '#004cff'
  - '#760188'
rainbow_banner_shown: auto
rainbow_banner_month: 6

rainbow_banner_colors accepts an array of CSS colors. rainbow_banner_shown accepts auto or always.

To to display rainbow banner all year long, change rainbow_banner_shown to always.