Colors of the optically and H I-selected galaxies. Upper:g − i color vs. M_HI/M_*. Downward arrows indicate upper limits. Symbols highlighted in black indicate the cross-matched galaxies that are plotted twice. The vertical dotted line at 0.64 indicates the cut between “red” and “blue” used in G18. The dashed horizontal line indicates a M_HI/M_* value of one. Lower: Histogram of the color distribution of both the MIGHTEE-detected (blue) and optically detected galaxies (pink).