Comparison between Hydra I color-magnitude relation in this work and the red sequence for the Virgo and Fornax clusters. The black line represents the running mean of the CMR for the Hydra I’s dwarfs in our sample, and the dotted lines show 1σ deviation (we use a fixed bin wide N = 30 individuals). The red dashed line is the CMR in the core of the Virgo cluster (Roediger et al. 2017). The blue dash-dotted line shows the Fornax CMR within 2R_core (Venhola et al. 2019).