Azure

# 3B53AA

Cornflower Blue

# 5679F7

Indigo

is a 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

Old Gold

# D1B349

or

Pastel Green

# 66D149

and

Cabaret

# D14966

To a colorblind person appears

Gray

# 818181