Bootstrap CSS classes wildcard [duplicate]

Question

Pedro, what you're looking for is called attribute selector. In your particular case, you can use it like this:

.unique [class~=col] {color:red }

but you could also use this with more wide options like

[class*='col-']

to cover preceding white spaces.

Also, here you have the same documentation in Spanish

The CSS attribute contains selector can be used to achieve this:

.unique [class*=col]{...}

MDN is a useful reference site for CSS selectors. For reference, the attribute selectors are found here.