The Lord is accustomed to blow His flute (veṇuṁ kvaṇantam). His transcendental form is the most attractive in all the worlds—His eyes are like lotus petals, and the color of His body is like the color of clouds. He is so attractive that His beauty excels that of thousands of Cupids. He wears saffron cloth, a garland around His neck and a peacock feather in His hair. In the Bhagavad-gītā Lord Kṛṣṇa gives only a small hint of His personal abode, Goloka Vṛndāvana, which is the supermost planet in the spiritual kingdom. A vivid description is given in the Brahma-saṁhitā.
(Bhagavad-Gita----8:21----purport).

These words stress that one should concentrate his mind upon Kṛṣṇa—the very form with two hands carrying a flute, the bluish boy with a beautiful face and peacock feathers in His hair. There are descriptions of Kṛṣṇa found in the Brahma-saṁhitā and other literatures. One should fix his mind on this original form of Godhead, Kṛṣṇa. One should not even divert his attention to other forms of the Lord. The Lord has multiforms as Viṣṇu, Nārāyaṇa, Rāma, Varāha, etc., but a devotee should concentrate his mind on the form that was present before Arjuna. Concentration of the mind on the form of Kṛṣṇa constitutes the most confidential part of knowledge, and this is disclosed to Arjuna because Arjuna is the most dear friend of Kṛṣṇa's.
(Bhagavad-Gita----18:65----purport).

The jñānīs, yogīs and karmīs are not particularly dear, for the karmīs simply want to see the Supreme Personality of Godhead as their order supplier. The jñānīs want to see Him to become one with Him, and the yogīs want to see Him partially represented within their heart as Paramātmā, but the bhaktas, or the devotees, want to see Him in His complete perfection. As stated in Brahma-saṁhitā (5.30):
veṇuṁ kvaṇantam aravinda-dalāyatākṣaṁ
barhāvataṁsam asitāmbuda-sundarāṅgam
kandarpa-koṭi-kamanīya-viśeṣa-śobhaṁ
govindam ādi-puruṣaṁ tam ahaṁ bhajāmi
"I worship Govinda, the primeval Lord, who is adept at playing on His flute, whose eyes are blooming like lotus petals, whose head is bedecked with peacock feathers, whose beauty is tinged with the hue of blue clouds, and whose unique loveliness charms millions of Cupids." Thus Lord Śiva's desire is to see the Supreme Personality of Godhead as He is described in this way-that is, he wants to see Him as He appears to the bhāgavatas, the devotees. The conclusion is that Lord Śiva wants to see Him in complete perfection and not in the impersonalist or voidist way. Although the Lord is one in His various forms (advaitam acyutam anādim), still His form as the young enjoyer of the gopīs and companion of the cowherd boys (kiśora-mūrti) is the most perfect form. Thus Vaiṣṇavas accept the form of the Lord in His Vṛndāvana pastimes as the chief form.
(Srimad Bhagavatam----4:24:44----purport).

The Lord's beauty resembles a dark cloud during the rainy season. As the rainfall glistens, His bodily features also glisten. Indeed, He is the sum total of all beauty. The Lord has four arms and an exquisitely beautiful face with eyes like lotus petals, a beautiful highly raised nose, a mind-attracting smile, a beautiful forehead and equally beautiful and fully decorated ears.
After the scorching heat of the summer season, it is very pleasing to see dark clouds in the sky. As confirmed in Brahma-saṁhitā: barhāvataṁsam asitāmbuda-sundarāṅgam. The Lord wears a peacock feather in His hair, and His bodily complexion is just like a blackish cloud. The word sundara, or snigdha, means "very pleasing." Kandarpa-koṭi-kamanīya. Kṛṣṇa's beauty is so pleasing that not even millions upon millions of Cupids can compare to it.
(Srimad Bhagavatam----4:24:45-46----translation and purport).

Lord Brahmā said: My dear Lord, You are the only worshipable Lord, the Supreme Personality of Godhead, and therefore I offer my humble obeisances and prayers just to please You. O son of the king of the cowherds, Your transcendental body is dark blue like a new cloud, Your garment is brilliant like lightning, and the beauty of Your face is enhanced by Your guñjā earrings and the peacock feather on Your head. Wearing garlands of various forest flowers and leaves, and equipped with a herding stick, a buffalo horn and a flute, You stand beautifully with a morsel of food in Your hand.
(Srimad Bhagavatam----10:14:1----translation).

Lord Kṛṣṇa's transcendental body was decorated with peacock feathers and flowers and painted with forest minerals, and His bamboo flute loudly and festively resounded. As He called out to His calves by name, His cowherd boyfriends purified the whole world by chanting His glories. Thus Lord Kṛṣṇa entered the cow pasture of His father, Nanda Mahārāja, and the sight of His beauty at once produced a great festival for the eyes of all the cowherd women.
(Srimad Bhagavatam----10:14:47----translation).

Lord Kṛṣṇa's hair, powdered with the dust raised by the cows, was decorated with a peacock feather and forest flowers. The Lord glanced charmingly and smiled beautifully, playing upon His flute while His companions chanted His glories. The gopīs, all together, came forward to meet Him, their eyes very eager to see Him.
(Srimad Bhagavatam----10:15:42----translation).

Dressed in a charming variety of garments, upon which Their garlands rest, and decorating Themselves with peacock feathers, lotuses, lilies, newly grown mango sprouts and clusters of flower buds, Kṛṣṇa and Balarāma shine forth magnificently among the assembly of cowherd boys. They look just like the best of dancers appearing on a dramatic stage, and sometimes They sing.
(Srimad Bhagavatam----10:21:8----translation).

His complexion was dark blue and His garment golden. Wearing a peacock feather, colored minerals, sprigs of flower buds, and a garland of forest flowers and leaves, He was dressed just like a dramatic dancer. He rested one hand upon the shoulder of a friend and with the other twirled a lotus. Lilies graced His ears, His hair hung down over His cheeks, and His lotuslike face was smiling.
(Srimad Bhagavatam----10:32:22----translation).

My dear friend, the luster of Kṛṣṇa’s body is more brilliant than that of a newly formed cloud, and His yellow dress is more attractive than newly arrived lightning. A peacock feather decorates His head, and on His neck hangs a lovely necklace of brilliant pearls. As He holds His charming flute to His lips, His face looks as beautiful as the full autumn moon. By such beauty, Madana-mohana, the enchanter of Cupid, is increasing the desire of My eyes to see Him.
(Sri Caitanya Caritamrta----3:15:63----translation).

Kṛṣṇa’s yellow garments look exactly like restless lightning in the sky, and the pearl necklace on His neck appears like a line of ducks flying below a cloud. Both the peacock feather on His head and His Vaijayantī garland (containing flowers of five colors) resemble rainbows.

(Sri Caitanya Caritamrta----3:15:66----translation).

My dear friend, where is Kṛṣṇa, who is like the moon rising from the ocean of Mahārāja Nanda’s dynasty? Where is Kṛṣṇa, His head decorated with a peacock feather? Where is He? Where is Kṛṣṇa, whose flute produces such a deep sound? Oh, where is Kṛṣṇa, whose bodily luster is like the luster of the blue indranīla jewel? Where is Kṛṣṇa, who is so expert in rāsa dancing? Oh, where is He, who can save My life? Kindly tell Me where to find Kṛṣṇa, the treasure of My life and best of My friends. Feeling separation from Him, I hereby condemn Providence, the shaper of My destiny.
(Sri Caitanya Caritamrta----3:19:35----translation).

My dear friend, where is that beautiful helmet with a peacock feather upon it like a rainbow upon a new cloud? Where are those yellow garments, shining like lightning? And where is that necklace of pearls that resemble flocks of ducks flying in the sky? The blackish body of Kṛṣṇa triumphs over the new blackish rain cloud.
(Sri Caitanya Caritamrta----3:19:39----translation).