H-R diagram of variable stars found in the NGC 381 region. The instability strips corresponding to slowly pulsating B-type, δ Scuti, and γ Dor stars are shown by red dotted curve, continuous line, and dashed line, respectively. The blue filled points denote the stars that were available in the catalogs of Anders et al. (2019) and Bai et al. (2019). The open circles represent stars whose effective temperatures were calculated using Torres’ (2010) relations.