Paphiopedilum concolor, commonly referred to as Yellow Lady's Slipper, has pale yellowish to yellow flowers, with tiny dark brownish spots that spread outward from the centre, whilst decreasing in density and size.

The lip of flower, which is modified into a slipper-shaped pouch, only has a few faint spots at its top, near the opening of the pouch and smaller in size than those on the leaves.