hello, my favorite color is blue
So is mine!  Blues typically contain a slight mixture of other colors; azure contains some green, while ultramarine contains some violet.  And blue is so pretty!
i agree, blue is such a appealing color
I love when the sky is blue, which is because of an optical effect known as Rayleigh scattering
I always wonder why the sky is blue
Blue
Blue is one of the three primary colours of pigments in painting and traditional colour theory, as well as in the RGB colour model. It lies between violet and green on the spectrum of visible light. The eye perceives blue when observing light with a dominant wavelength between approximately 450 and 495 nanometres. Most blues contain a slight mixture of other colours; azure contains some green, while ultramarine contains some violet. The clear daytime sky and the deep sea appear blue because of an optical effect known as Rayleigh scattering.
use of iron oxides. Some mascaras contain ultramarine blue.
Mascara is composed of a base mixture of pigments, waxes, and oils with varying supporting components. Mascara pigments most commonly include iron oxides and titanium dioxide which provide mascara with its desired color. Titanium dioxide (TiO) accounts for over 65% of inorganic pigments sales volume. TiO gives the pigment a white color while different iron oxides provide a variety of colors such as red, yellow, brown, and black. The particle size of opaque pigments ranges from