Dark blue and blue black are not the same color. Ink blue refers to the color whose main color is blue but a little black. Blue black refers to the color whose main color is black but a little blue. In fact, that is to say, dark blue will be blue, while blue and black will be black, so the two are not the same color. Is ink blue and blue black the same color? Blue is one of the three primary colors of red, green and blue light. Among the three primary colors, blue has the shortest wavelength, generally 440-475n nm, which belongs to short wavelength.
There are many kinds of blue, including Malachite blue, cobalt blue, lake blue, indigo, blue, blue, royal blue, Tibetan blue, water blue and so on.
Blue symbolizes eternity. Every blue in the blue field has a different meaning. （MoLanHeLanHeiShiYiGeYanSeMa）