Synthetic SDSS color-color diagrams derived from the MUSE (open circles) and XSL (open triangles) spectra. Larger open circles mark known variables, according to the SIMBAD database. and although many stars are variable, some distinct outliers are not. Sequences for solar abundance dwarfs (red line) and giant (green line) stars from Lenz et al. (1998) are also shown. The extreme red outliers are IRAS 15060+0947 (V* FV Boo) – a known Mira variable. There are two points for this object on the right panel – they correspond to the XSL and the MUSE spectra.