Brompton colored handlebar grips are available as an accessory. They fit standard diameter (22.2mm) MTB type bars as well as all Brompton bars.
Available colors are Red, Blue, Lime Green, White, Yellow and Black in two lengths each. The "M" Type are 115mm (~4.5") long and the "S" Type are 130mm (~5 1/8")long.
Dress up that ride!