Changed variables to have more contrast

[jordythevulder]

Changed the border colors to have a bit stronger color, a very subtle change.

[royduin]

If we really want this everywhere; please apply this everywhere:

• https://github.com/rapidez/blade-components
• https://github.com/rapidez/docs

[jordythevulder]

I've changed it everywhere:

• Rapidez blade components Changed border colors to have a bit more contrast blade-components#17
• Rapidez docs Changed border color contrast docs#71