Bright Blue
noun
What is lapis lazuli glassy color? It's bright blue. If you've never seen the rock lapis lazuli, look it up and you'll see why this means bright blue!
This word is generally used in literature.
You learned all three of these readings when you learned the kanji. You should be able to read this on your own.
莉子は、瑠璃色のワンピースを着て諒一郎との待ち合わせ場所に現れた。
Riko showed up wearing a bright blue dress at the place she was meeting Ryoichiro.
ヒゴタイは、瑠璃色で丸い形をした、とても可愛い花です。
Bright blue and spherical in shape, the higotai is a very pretty flower.
ふと、瑠璃色の美しい宝石のような虫が目にとまった。
Suddenly, a beautiful bright blue insect that looked like a jewel caught my eye.