Thanks !
I tried to add this lines to internal themes but when selecting it in locus maps keeps on loading and loading...and don't load:) I tried with internal vector maps and with andromaps as well

What should I do??
edit
And here's the theme in the link, I added the lines into XML file and copied SVG into symbols folder.
Still loading and loading....
Edit:
Here in Poland we classify bicycle routes with icn,rcn, lcn etc but in real life they are marked with signs jusc already posted. My idea is to create a separate theme which will cosider only colours not the clasification icn,lcn etc.
Just let me know if you can add it, then I will create a theme for polish cyclists

I hope many will be satisfied.
Thanks!