I would spot test with a little bleach or diluted tea tree oil.

vinegar? or aldi stain remover, that stuff is amazing

White Vinegar: this can used to clean almost anything. Simply dampen a cloth with vinegar and wipe the mold away, then use a clean cloth to wipe them again. Also kid safe!

Oil of Cloves: great for removing and preventing mold BUT take care around children.

a steam cleaner is a great natural way to remove mould from blinds, freshen your furniture and and other household items

If the sun blinds are canvas/material, try using a multi purpose enjo cloth with warm water.