Trouser Jacket Conundrum

[Mr. Speakeasy]

Recently I have gotten my hands on a light brownish grey tweed vest and matching morning coat from 1919, it is beautiful with a light blue stripe that is only visible in the right light. But I am having some difficulty matching it with the right pair of trousers, it looks good with a Victorian pair of striped black trousers but what i'm wondering is if its considered okay to wear a light grey jacket with black trousers?

 

[Qirrel]

I like the combination, and have seen it done well several times. Here is a painting (doesn't show a whole lot of trousers, but you get the idea):