mpv.conf: add commented Tiresias PCfont && set font color to Amber

I am just being distracted and I use the amber colour a lot including in Dark Reader which seems to affect some video subtitles

conf/mpv.conf

@@ -14,6 +14,12 @@ slang=fi,fin,sdh,doh,en,eng,eo,epo,sv,swe,ru,rus,cs,ces,cze,es,spa
 # relevant with subtitles
 #sub-font='Noto Serif Regular'
 sub-font='Comic Shanns Mono'
+# YLE uses Tiresias Screenfont which is the only not-FOSS one. This is the
+# closest?
+#sub-font='Tiresias PCfont'
+
+# Amber font for subtitles
+sub-color='#ffb700'
 
 # Enable two simultaneous subtitles (first slang on bottom, second on top?)
 sid=auto