mood board

US /ˈmuːd bɔːrd/
UK /ˈmuːd bɔːrd/
"mood board" picture
1.

an arrangement of images, materials, pieces of text, etc., intended to evoke or project a particular style or concept

:
The interior designer created a mood board to show the client the proposed aesthetic for the living room.
Before starting the new fashion collection, the team put together a vibrant mood board with colors and textures.