Yep Casino

Yep Casino is a colour-palette studio that fits in your pocket. Pick a base colour on the hand-painted wheel, choose a harmony rule, and the app builds a balanced palette around it. Lock the swatches you like, re-roll the rest, and fine-tune anything by hand until it is exactly right.

Everything happens on your device. No account, no sign-in, no connection required.

MIX
• A painted HSV colour wheel with a live thumb — drag to set hue and saturation, slide for brightness.
• Eight colour-theory rules: Analogous, Monochrome, Complementary, Split Complement, Triadic, Tetradic, Square and Shades. Each one explains itself as you select it.
• Ghost markers on the wheel show where the rule will place your other swatches, so the tool teaches while you use it.
• Three to six swatches per palette, your choice.

REFINE
• Tap the lock on any swatch to pin it. The next re-roll keeps every locked colour and replaces only the rest — the fastest way to close in on a palette that works.
• Long-press a swatch to type an exact hex code, nudge it lighter or darker, or promote it to the palette's base colour.
• WCAG contrast badges on every swatch tell you at a glance whether text will read cleanly on that colour.

KEEP
• Save palettes with a name and a collection, then search by name, collection, note or hex code.
• Star the ones you keep coming back to, filter to just those, and sort by newest or A–Z.
• Add a note to any palette so you remember what it was for.
• Thirty-six curated starter palettes across nine collections — Coastline, Desert Dusk, Deep Forest, Nocturne, Citrus Market, Berry Press, Soft Pastel, Ink & Paper and Retro Arcade — so the library is useful from the first launch.

USE
• Tap any swatch to copy its code straight to the clipboard, or copy a whole palette at once.
• Switch between HEX, RGB and HSL globally in Settings — copying follows your choice.
• Every colour gets a plain-English name, so a palette reads as Copper, Sage and Espresso rather than three hex strings.
• Share a palette as plain text to any app on your phone.

TRACK
• The Record screen counts the palettes you have kept, starred, mixed and copied.
• A weekly bar chart shows what you saved on each of the last seven days.
• A hue-mix donut shows which colour families your library actually leans on.
• Eight badges unlock from those same counters — no separate scoring system to chase.

BUILT TO STAY OUT OF THE WAY
• Fully offline. No servers, no tracking, no advertising, no analytics.
• No permissions requested at all.
• Palettes, notes and preferences live in local storage on your phone and nowhere else.

Whether you are designing an app, painting a room, planning a brand or just collecting colours you like, HazelChain gets you from one colour to a finished palette in seconds.