(g − i)₀ (left) and (g − r)₀ (right) color-magnitude diagrams of the HI MATLAS dwarfs (blue and orange markers) as compared to the ones with no HI detection (gray markers). The colors are computed from GALFIT models (gray and blue markers) and SOURCE EXTRACTOR aperture photometry (orange markers). Dashed lines: median colors of the sample of MATLAS dwarfs with no HI detection. We separate the dwarfs by dE (top, circles) and dI (bottom, triangles) morphology.