"Andrew has a grey button."
Translation:Tha putan glas aig Anndra.
It's interesting that glas = grey in this course. In outdoor contexts, glas is one of those peculiarly Gaelic colours that occurs regularly in the Highland landscape and is usually translated as 'grey-green', eg Beinn Ghlas, Glas Bheinn. On the Walk Highlands page for Meall Glas (https://www.walkhighlands.co.uk/munros/meall-glas) the spoken translation refers to the "green grey hill".