Blue themes

Burj Khalifa

By: MrCookie

Blueji

By: apo

The-Hermit's Hideout

By: Lateralus

Green Glow

By: MrCookie

Neon Circle (Blue)

By: MrCookie

Neon Circle (Purple)

By: MrCookie

Day Dream

By: GENKI

Brave Blue by Redk

By: redk28

Blue & Green X

By: Kocaelispor

Only For You

By: Acidental Heart

Gradient Bubbles

By: MrCookie

Blue Nebula

By: jewels1ng

Nordic Darker

By: PandaSoli

Skyline Retrowave

By: PacketHauler

PurpleDawn

By: PurpleDawnYT

Stray+B12 cuddling

By: GentooMan3805

Pilgrims

By: kisokusei

Vegetables

By: Kocaelispor

Colorful X

By: Kocaelispor

Halo

By: jewels1ng

Materia-Dark modified

By: Deanne

Dark Blue by Redk

By: redk28

NightVeil

By: jewels1ng

Cosmic Cliff

By: J Vernet