I’m not a big fan of learning lists of words, but spending a few minutes working out the tones and reading aloud these colours a few times will definitely help.
If you are planning to memorise these, always create a series of short phrases with different combinations that have some meaning for you. Also, note that there are situations where we drop the word สี and it’s usually when we are referring to something more specific.
light bluelight blue
dark bluedark blue