She also debuted a warm weather-coded hair color change ... the Big Little Lies actress’s taupe ruffled mini dress fit into the between-seasons category, thanks to its earthy color tone ...

The duo were on hand for Jay's mom's 75th birthday party and for the occasion, Beyoncé wore a dramatic Chloé dress that was completely sheer and featured long, ruffled details and statement sleeves.

She did, after all, tease a look "very different" from her signature silver hair ahead of the ceremony ... which featured a dramatic ruffle bust detail, as well as Verdura earrings and a Roger ...