Marbled Beauty Moth Bryophila/Cryphia domestica

Marbled Beauty moth
Marbled Beauty moth
The Marbled Beauty, same moth (above), different background, gives impression of a different colour. Wingspan 20-25mm; UK flight Jul-Aug.
(The Beautiful Marbled is an entirely different moth.)
Marbled Beauty moth Blue colours on white. Caterpillars eat lichens.
Marbled Beauty moth Younger specimen, under artificial light, greenish (here) or pinkish (elsewhere) colours emerge but soon fade.