Ultramarine

# 1603A5

Blue

# 2004F2

Dark Blue

is a very saturated very light cold blue

Blue is a cool calming color that shows creativity and intelligence. It is a popular color among large corporations, hospitals and airlines. It is a color of loyalty, strength, wisdom and trust. Blue has a calming effect on the psyche. Blue is the color of the sky and the sea and is often used to represent those images.
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That goes well with

Rio Grande

# B4CC04

or

Malachite

# 04CC1B

and

Milano Red

# CC1B04

To a colorblind person appears

Emperor

# 4f4f4f