[little jeremiah]

The blue is described like the dark bluish color of rain-laden monsoon clouds.

Brahma Samhita 5.30

I worship Govinda, the primeval Lord, who is adept in playing on His flute, with blooming eyes like lotus petals with head decked with peacock’s feather, with the figure of beauty tinged with the hue of blue clouds, and His unique loveliness charming millions of Cupids.

And for good measure:

5.32

I worship Govinda, the primeval Lord, whose transcendental form is full of bliss, truth, substantiality and is thus full of the most dazzling splendor. Each of the limbs of that transcendental figure possesses in Himself, the full-fledged functions of all the organs, and eternally sees, maintains and manifests the infinite universes, both spiritual and mundane.

[SunkenCiv]

Thanks little jeremiah!