In addition to cruising Rainbow was developed to join the J Class racing circuit as well. This resulted in a semi open layout with wide corridors. Accommodation is provided for 6 to 8 guests, with a stateroom aft and two symmetrical ensuite twin guest cabins. The main salon has, in addition to a large dining table, a comfortable daybed. The interior is finished in red stained Sapele Mahogany with white upper wall paneling in the cabins for that airy feel. An art deco touch is added by the miscellaneous handmade joinery details, custom lighting and interior hardware.