If they are more greenish, you have warm undertones.
If you could’t see your veins clearly, try the paper test.
Hold a bright white piece of paper next to your face and see how it makes your skin look.

If your face has a pinkish glow to it, you likely have cool undertones.
This is in comparison to your skin looking yellowish or slightly washed-out, both of which indicate warm undertones.
Kate Middleton and Kate Moss are good examples of cool-toned summers.

Your eyes will be bright shades of brown, black, hazel, blue, or green.
Anne Hathaway and Naomi Campbell are both winters with cool undertones.
For cool winters, vivid colors are your best friend.

If you’re more of a neutrals fan, pure white and black will also suit you.
For cool summers, soft white is your go-to neutral, as are taupe and rosy brown.
The above is a basic guide to finding out if you’re a cool summer or winter.