We present HST/WFPC2 single-star photometry for the blue dwarf galaxy UGCA 290 , whose morphology is intermediate between classic iE Blue Compact Dwarfs and blue dwarfs which exhibit no red background sheet of older stars .
The color-magnitude diagram of this galaxy in V and I , extending over six magnitudes , is remarkably similar to that of the star-forming region in the iE Blue Compact Dwarf VII Zw 403 .
There is no evidence for gaps in its star-formation history over the last billion years , and the color of its red giant branch indicates a very metal-poor stellar population .
From the magnitude of the tip of the red giant branch , we derive a distance of 6.7 Mpc , more than twice the distance estimated from the brightest blue supergiants .