Upper panels: ${\text{PW}}_{G,G_{BP},G_{RP}}$ diagrams for 43 variable stars that are considerably brighter than UMi’s HB (G < 19.25 mag). The magenta and yellow filled circles mark sources within and beyond 12r_h from the galaxy centre. The solid lines show the ${\text{PW}}_{G,G_{BP},G_{RP}}$ relations for MW ACs (ACEP; left panels) and CCs (CEP; right panels) from Ripepi et al. (2023), with their related uncertainties (dashed lines). ${\text{PW}}_{G,G_{BP},G_{RP}}$ relations for fundamental mode pulsators (lower lines) and first-overtone pulsators (upper lines) are displayed in different colours. Lower panels: zoomed-in view (between 0.0 and −2.7 in W) of the ${\text{PW}}_{G,G_{BP},G_{RP}}$ diagrams in the upper panels. The green filled circles mark stars V56 and V80, classified as ACs by N88, but not confirmed as RR Lyrae stars or Cepheids in Gaia DR3. Pulsation periods and intensity-averaged magnitudes from Gaia data are not available for these two stars (see discussion in the text).