Wiktionary
a. Of a delicate pale blue colour. n. 1 A delicate pale blue colour. 2 robin's-egg blue.
Usage examples of "eggshell blue".
The floor covering resembled nothing more than eggshell blue lambs wool.
The furniture and fittings all seemed to date from the I Love Lucy period: worn, utilitarian, a lot of beige and brown and eggshell blue.
The Aubracs were a place largely devoid of colour: the flat, uninteresting islands lay under bleaching sunlight, the sand and pale gravel of the inland plains drifted into the towns on the constant winds, the pallid eggshell blue of the shallow lagoons could be glimpsed with every turn of the head.
The sky was eggshell blue and empty of cloud, but close to the western horizon, he saw, there was a band of darkness, like a storm front.
The eggshell blue washed over the wizards and disappeared beyond the confines of the room.