monochrome and color (predefined) icons in author bio

[bquast]

What happened?

• Minimal Mistakes version: master branch
• Ruby gem or remote theme version:
• Jekyll version:
• Git repository URL: bquast/bquast.github.io
• Hosted on GitHub Pages (if yes provide URL to site): bastiaanquast.com
• Operating system:

Expected behavior

When setting social media links in an (sole) author bio I get a mix of color and monochrome icons.

It seems to me that the icons that have a dedicated liquid tag in the author file (e.g. facebook, github, SO, etc.) show up in color, and the other ones (e.g. wikipedia, python, r-project) show up in monochrome. The icons that have a predefined liquid tag even show up in color if I define them using the same method as the links that don't have a pre-defined liquid tag.

Expectation: all icons to be monochrome (or color, or a setting)

Steps to reproduce the behavior

Other

https://github.com/bquast/bquast.github.io

[bquast]

just noticed, the exception this rule appears to be email, which is predefined, but shows up monochrome

[bquast]

pps. same for the location