"sober style" is a correct and usable phrase in written English.
You can use it to describe a particular style or aesthetic of something, usually when referring to clothing or decor. For example, "The bride wore a classic, white gown in a sober style".
Messrs. Ngugi, Achebe and Soyinka are certainly masters, but of an earnest and sober style.
But it was in keeping with the artist's honest and sober style.
"I hear the word deadpan a lot," he said in regard to his sober style of comic acting.
He scaled back his customary satire and mockery, adopting a relatively sober style befitting his larger subject — what it takes to be a hero.
Politico's informed political coverage, sometimes spiced with attitude from its writers, complements Reuters' sober style and Washington coverage that often reads as if written for an overseas audience.
Many in the crowd might agree with the car's designer, Giorgietto Giugiaro: "It has an unobtrusive, sober style and great personality".
Dressing when you're an older woman usually involves the following: dark colours, greater coverage and sober styles – and avoiding any claims to sexual attention (God forbid).
With the decline of severely sober styles like Minimalism and formalist abstract painting, the 1970s were ripe for an art of irrational exuberance, decorative flamboyance, personal idiosyncrasy and — it being early in the post-Stonewall era — unabashed expression of alternative sexuality.
He has adopted a more sober presidential style, admitted to mistakes and promised a fresh round of reforms.
Whitechapel Square, as the Sainsbury's project is called, is in the sober, gridded style of current critically approved architecture.
"Merkel is so beloved for her sober, unglamorous style of governing," said Frank Decker, a professor of political science at the University of Bonn.
