Thank You for nice collection of mapping icons!
It would be nice to make the icons mere configurable – adding possibility to change fill and outline colour.
It can be achieved by replacing (RegEx syntax)
fill="[^"]+"\/>
with
fill="param(fill) #FFF" stroke="param(outline) #000" stroke-width="param(outline-width) 1"\/>

Original icon. The icon's colour cannot be changed.

_All icons are the same colour.

It is possible to change fill colour as well as outline width and colour for the modified icons.

Icons can be drawn in different colours.