"Matching blazer" refers to a blazer or suit jacket that complements or coordinates with something else, such as pants or a skirt, creating a unified and stylish outfit. Full definition
But yes, if your shoes match your blazer and bag, you've got a very conservative look, only trendy. (creativefashionglee.com)
There's quite a range on offer too so if matching your blazer & trousers is a step too far you can quite confidently mix & match this one. (michelle-tyler.com)
I also need to match the blazer fabric to the weather. (40plusstyle.com)