Migrating color variables and create a new file.
Change colors name and replace old rgba colors.
Remove rgba colors and migrate to color-theme.
Change color-theme position.
Remove color 3 and 4, create a contidion to colorize top bar icons and remove unnecessary space.
Remove color 3
Fixed conflict
Merge pull request #1063 from deividmarques/3.2.0

Add wai-aria to alert element
Merge pull request #1062 from Wylkon/color-improvement

Color improvement
add wai-aria to collapse element
add wai-aria in the documentation of collapse element