combine CCS codes/styles into one?

[gordonisnz]

Hello.

I'm wondering if it's possible to combine the CCS into one code.

For example: w3-yellow is here

.w3-text-yellow,.w3-hover-text-yellow:hover{color:#d2be0e!important}

I'm wondering if I can do my own code = I've tried this, but doesn't work.

.w3-mynewcode{w3-yellow, w3-center}

so using one new code will activate 2 or more existing codes. Or will I need to find the 'full' code of each thing, and insert them all into one code?

.w3-mynewcode:hover{color:#d2be0e!important, center} etc.. ?