Red = orange (can be light to dark -darker the better)
Cream (dilute of the red) = pale orange or buff/creamy color
Blue (dilute of black) = pale grey to darker grey - pale preferred.
Chocolate = warm milk chocolate color
Lilac = dilute of chocolate - pinkish blue color
Brown tabby is genetically a "black". I'm glad your kitty had both a red tabby and a cream tabby. Then people can really tell the difference between the two colors
And your little red has a nice deep color too
One of the best red tabbies I've seen came from a mixed breed litter. Unfortunately I didn't get to adopt him. He'd have made a top quality household pet show cat! He was not only a very deep red color, he was a classic tabby too - with white paws - very very stricking.
I also had a very stricking red classic tabby cornish rex that was shown. Judges were very impressed with the color as it was rare to have classic tabbies in rexes - most are mackeral.
And looks like you might have both classic and mackeral tabbies. Classic is a bullseye swirl on the sides. Mackeral is the vertical stripes like a mack fish on the sides.