You can find Common NCL bases in the wild and on rolled kings. They can also be applied using Base Changers.

Camel Caramel Cedar Chocolate Cream Cream Darker Cream Lighter Dark Golden Deep Fawn Dove Gray Dusty Khaki Lemon Light Cream Light Golden Medium Golden Mongoose Mulberry Oatmeal Rosy Brown Savannah Sienna Sundust Sunflower Wheaten Zarafshan Zarasa Zarbanu Zarin Zer Zivar

If your lion is a Dreamboat, you have a chance of encountering these Special NCL bases in Explore!
Special NCL bases require at least one parent to have the base in order for it to potentially pass onto cubs.

Asali Dhahabi Maziwa Mobola

Common Custom bases can be applied using Base Changers.

Albino Almond Antler Apricot Auburn Beige Birch Bisque Bisquit Black Blonde Bone Brass Bronze Brown Chestnut Copper Cremello Dark Brown Dark Fawn Dark Vanilla Deira Dikela Doubloon Ducat Dun Dusty Rose Eggshell Fallow Fawn Ginger Gray Hazelnut Henna Isabel Jacinthe Jet Linen Liver Luteo Mahogany Mauve Obsidian Ochre Palomino Pecan Persimmon Pewter Redwood Ruddy Rust Saffron Sandy Silver Silver Gray Sorrel Steele Sterling Sunglow Tan Tawny Titanium Vandal Vanilla White Wild Rose

Uncommon Custom bases can be applied using Base Changers.

Aspen Buttermilk Butternut Clear White Gunmetal Gray Korat Maltese Onyx Rhubarb Rufous Russet Sunshine Topaz Willow Xanthic

Rare Breed-Only bases cannot be applied using Base Changers or any other applicators. They can only be achieved via breeding.

Amber Anjeer Argent Ashen Buff Buttercream Cameo Champagne Chartreux Cinnabar Cocoa Dinar Ebony Fiery Flaxen Flint Fulvous Goldenrod Goridhe Honey Maroon Nacarat Noctis Platinum Prune Sapela Shedua Slate Sulphur Taupe Teardrop Udara Umber

These Special Breed-Only bases cannot be chosen in the Custom Lion Oasis tools, nor applied using the Base Changer item. They can only appear on cubs bred from at least one parent with that specific Special base.
Special Breed-Only bases require at least one parent to have that base in order for it to potentially pass down onto their cubs.
Celestial, Dawn, Jellyfish, Leonid, Prismatic, Sidereal, Skyward, Stratosphere, Sunrise, and Sunset are bases that are only released on event-only raffle lionesses during July.
Bushveld, Haze, Lilac, Orchid, Pearl, and Sepia are occasionally released on weekly raffle lionesses year-round.
Abyssinian, Damu, Nudar, Ripe, Sahara, Sunspot, and Wine are released through groupies during May.
Bandit, Ruffian, Scoundrel, Ukame, and Vagabond are released through event studs during August.
Kimanjano is only found on first generation Leopons and their descendants.
Mandarin is only found on first generation Tigons and their descendants.

Abyssinian Bandit Bushveld Celestial Damu Dawn Haze Jellyfish Kimanjano Leonid Lilac Mandarin Nudar Orchid Pearl Prismatic Ripe Ruffian Sahara Scoundrel Sepia Sidereal Skyward Stratosphere Sunrise Sunset Sunspot Ukame Vagabond Wine

Year-Round  

These Applicator bases can be crafted year-round in Monkey Business.

Azalea (Scent of Azalea) Citron (Citron Base) Fuchsia (Scent of Fuchsia) Glass (Glass Dust) Gregarious (Gregarious Form) Grullo (Grullo Stud) Hibiscus (Scent of Hibiscus) Locust (Gregarious Phase) Marula (Sweet Sweet Marula) Protea (Scent of Protea) Swarm (Shape of Swarm) Trophy (Trophy of the Champions) Victor (Victor's Secret) Water Hyacinth (Scent of Water Hyacinth)

Event-Specific  

These Applicator bases can be crafted during their respective events.

Ammonite (Ammonite Body) Bloodstone (Dust: Bloodstone) Brimstone (Brimstone Core) Cretaceous (Cretaceous Body) Fossil (Fossil Body) Haliotis (Murex Base: Haliotis) Hematite (Dust: Hematite) Howlite (Dust: Howlite) Kunzite (Dust: Kunzite) Labradorite (Dust: Labradorite) Meteorite (Dust: Meteorite) Moonstone (Dust: Moonstone) Moss Agate (Dust: Moss Agate) Nautilus (Nautilus Body) Nuummite (Dust: Nuummite) Opal (Dust: Rough Opal) Rhodonite (Dust: Rhodonite) Rough Ruby (Dust: Rough Ruby) Shard (Shard Body) Skeletal (Skeletal Body)

These Applicator bases can be found from specific rare encounters during their respective events.

Interstellar (Interstellar Remnants) Solaris (Solaris)

These Applicator bases can be found in ways other than your typical methods!

Decennial (Decennial Base) Festive (Festive Gift)

These Applicator bases can be purchased from specific shops during their respective events.

Aardwolf (The Aardwolf) Alabaster (Favour of Bast) Angelic (Angelic Core) Ankh (Token of Bast) Anubis (Royal Coat of Anubis) Arctic (Arctic Circle) Ardor (Ardor Elegance) Ancestral (Ancestral Body) Astral (Astral Fire) Atlas (Atlas Titan) Aufeis (Aufeis Sheet) Augur (Augur Prophecy) Bast (Royal Coat of Bast) Blazing (Blazing Corpse) Blood Moon (Blood Moon Body) Bloodbourne (Bloodbourne Infection) Blue Poinsettia (Blue Poinsettia Scent) Blush Rose (Kiss from a Rose) Chaos (Relic of Seth) Chatoyant (Chatoyant Enamel) Cherry Blossom (Cherry Lips) Cotton Candy (Taste of Cotton Candy) Demiurge (Touch of Demiurge) Demonic (Demonic Core) Divine (Curse of Divine) Duat (Relic of Anubis) Ethereal (Ethereal Body) Flamingo (Fluffness of Flamingo) Frostbitten (Frostbitten Skin) Glacial (Glacial Facial) Green (Feast of (April's) Fools) Guardian (The Guardian) Hallowed (Sacred Body) Haruspex (Trained Haruspex) Haunted (Haunted Body) Heavenly (Heavenly Serenity) Hirola (Haunch of Hirola) Hyena (The Hyena) Ice (Spicy Ice) Incense (Token of Anubis) Inferno (Infernal Blood) Inpu (Vestige of Anubis) Ivory (One with the Giants) Jacana (The Jacana) Maat (Relic of Bast) Manakbir (Date with Manakbir) Medal (Shiny Medal) Merlot (Taste of Merlot) Mummy (Token of Seth) Murk (Murk Body) Nacre (Nacre Lining) Ornament (Ornate Body Frame) Parhelion (Parhelion Body) Peach (It's All Peachy!) Penumbra (Penumbra Body) Phantom (Phantom Body) Ragdoll (Chonky Ragdoll) Reindeer (Reindeer Base) Rhino (True Titan) Seer (Seer Divination) Seth (Royal Coat of Seth) Sha (Favour of Seth) Spectre (Spectre Body) Supernal (Supernal Body) Sutekh (Vestige of Seth) Triumph (Triumphant) Ubaste (Vestige of Bast) Unholy (Unholy Body) Velvet (Favour of Anubis) Wicked (Wicked Body) Windfall (Windfall Body)

These Applicator bases are given out as rewards for completing storylines during their respective events.

Deshret (Grace of Seth) Nefer (Grace of Bast) Wepwawet (Grace of Anubis)