Custom primary and accent color option

[martinberoiz]

Hello,

I added an option to customize the colors outside the given palette. All the previous colors remain untouched so they still work, but I added one more custom option to have any hex code.

Please tell me if this is something you would be interested in adding and I can add documentation if you want.

Thanks.

[ThomasTNO]

Any update on this? @bashtage