I was just looking at a chalk bag I have and thinking it would be very nice to pull that one out for the remainder of winter - such a lovely shade of white. Hayden-Harnett did/does 'chalk' very nicely.
I'd say GO FOR IT!
Another Minnesotan here (Minneapolis originally from Los Angeles).
I am leaving to visit my family in Greece tomorrow and was wondering if I should bring my chalk Havana HH. You don't think that it is too bright a white to wear in winter?