[NTG-context] how to change the colour of the footnote marker

Today I wanted to print an entire document not in standard black, but in blue. I added (Mk II) – \setupcolors [state=start] \define\kleur{blue} % so I can change the colour uniformly everywhere through this variable \startcolor [\kleur] \setupnote[footnote][before={\color[\kleur]}] \setupfooter [color=\kleur] – and everything becomes blue, but NOT the footnote number before the footnote itself at the bottom of the page (the marker in the main text is coloured the way I want). Can anyone tell me how to change the colour of the footnote number in the note? Robert