ice blue

noun, adj — 2 senses

ice blue

noun

1

A very pale blue colour.

It is finished in the standard ice blue adopted by BR for refrigerated vehicles.1964 April, G. Freeman Allen, “The BRB shows traders the Liner train prototypes”, in Modern Railways, page 262:

ice blue

adj

1

Of a very pale blue colour.

Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.