Evolution of photometric properties at late times for models s15p2Pwr1e40 (solid) and s15p2NoPwr (dashed). From top to bottom, we show the bolometric luminosity, the fractional power emerging in the far-UV (δL_FUV; 1000 < λ/Å < 2000), the near-UV (δL_NUV; 2000 < λ/Å < 3500), the optical (δL_opt; 3500 < λ/Å < 9500), and the IR (δL_IR; λ/Å > 9500), followed by the R-, U-, and UV W2-band magnitudes and the U - V color.