Distribution of sources with EW and observed g − r color (tracing approximately UV–optical rest-frame), separated by ionization source and cluster dynamical state. The samples are matched in i-band magnitude and Hα luminosity. Star-forming galaxies have higher EWs than AGNs, irrespective of galaxy color. Star-forming galaxies in merging clusters have higher EWs, or sSFRs, compared to counterparts in relaxed clusters.