Vishnu

Vishnu is one of the trimurti in Hinduism. Vishnu विष्णु is the preserver and protector of the universe. He protects the universe from being destroyed and keeps it going, according to this religion. Vishnu has 10 incarnations (Avatar अवतार)
He is considered to live in the city of Vaikuntha on Mt. Meru. The city which is made of gold and other jewels.
He is believed to be the all-pervading, omniscient, omnipresent god. So, Lord Vishnu is shown in blue color as he is infinite and immeasurable like the sky and surrounded by the infinite cosmic ocean. Sky, which seems to have no beginning or end, is in blue color.
Jagannath Temple, Puri

Sanskrit: कदाचित्कालिन्दी तट विपिनसङ्गीततरलो मुदाभीरीनारीवदन कमलास्वादमधुपः । रमाशम्भुब्रह्मामरपति गणेशार्चितपदो जगन्नाथः स्वामी नयनपथगामी भवतुमे ॥१॥ Translation: Kadahit Kalindi tatta vipina sangita taralo Mudaa abhiri Naarivadana Kamalasvada madhupah | Ramaa Shambhu Brahmaamarapati Ganesharchita pado Jagannathah Swami

Lord Venkateswara is the main deity of the Tirumala temple, Tirupathi. The lord is an incarnation of Lord Vishnu. Sanskrit: कौसल्या सुप्रजा राम पूर्वासन्ध्या प्रवर्तते । उत्तिष्ठ नरशार्दूल कर्त्तव्यं दैवमाह्निकम् ॥१॥ Translation: Kausalyaa Su-Prajaa Raama Puurvaa-Sandhyaa Pravartate |

Sanskrit: महायोगपीठे तटे भीमरथ्या वरं पुण्डरीकाय दातुं मुनीन्द्रैः । समागत्य तिष्ठन्तमानन्दकन्दं परब्रह्मलिङ्गं भजे पाण्डुरङ्गम् ॥१॥ Translation: Mahaa-Yoga-Piitthe Tatte Bhiimarathyaa Varam Punnddariikaaya Daatum Muni-[I]indraih | Samaagatya Tisstthantam-Aananda-Kandam Parabrahma-Linggam Bhaje Paanndduranggam ||1|| Meaning: 1.1 (Salutations to Sri Panduranga) In the Seat of Great

Sanskrit: कायेन वाचा मनसेन्द्रियैर्वा । बुद्ध्यात्मना वा प्रकृतिस्वभावात् । करोमि यद्यत्सकलं परस्मै । नारायणयेति समर्पयामि ॥ Translation: Kaayena Vaacaa Manase[a-I]ndriyair-Vaa Buddhy[i]-Aatmanaa Vaa Prakrteh Svabhaavaat | Karomi Yad-Yat-Sakalam Parasmai Naaraayannayeti Samarpayaami || Meaning: 1: (Whatever I do) with my Body, Speech, Mind or Sense Organs, 2: (Whatever I