1 or RB - Rainbow

White body with red and yellow horizontal stripes on sides, green stripe on back, and silver scales on the belly. Often the white body shows through creating an additional 'white stripe' of color. Introduced for River Runt Spooks in 1933. Color code changed in 1946 from '1' to 'RB'. River Runt Spooks typically have green faces and gold eyes.

This is a cataloged color for River Runt Spooks and uncataloged for the Weedless Widow.

(Picture of Weedless Widow courtesy of Glen Brewton!)