Dark Racing Green Envelopes – Best UK Price – All Popular Sizes In StockNew! – GF Smith Colorplan luxury 135gsm thickness racing green envelopes are a traditional dark green tone. Smooth wove finish with continuous and even colour inside and out plus a wide range of Matching Racing Green Stationery.. The finest traditional dark green envelopes. Available in all popular sizes, with a gummed flap option. Racing Green Envelopes perfect for Matched Green Wedding Stationery, themed occasions/events and for Green Corporate Stationery if it matches your branding.