The basic black blazer is a must have. It is easier to look good with the blazer if we know how to combine stylishly. The colored pants I recommend are
How to Wear a Yellow Blazer
Q: what can I wear with a yellow blazer?
1. You can combine it with a black top and a pair of black pants.
You should wear black shoes with this combo.
2. If you have a mustard yellow blazer you can wear your blazer with the black top and white pants.
You can use the above-mentioned combinations, or:
1. You wear your blazer with a black top and a white skirt.