Arcade
Open in tool →Hot pink, cyan and acid yellow on near-black — cabinet-glow neon; the black surface is what makes the colours light up.
Color
#f3ff0a
#f3ff0a
hex
#f3ff0argb
rgb(243, 255, 10)hsl
hsl(63, 100%, 52%)oklch
oklch(0.959 0.213 113.2)Closest name: Busy Bee (#f4ff00)Relative luminance 0.906
Colors that go with #f3ff0a
Blue, Taupe and Violet lead the list. Each partner is a real named colour with the reason it works — a wheel relationship, a neutral that carries it, or a pairing lifted from a palette or brand system that actually shipped — and every pair opens in the palette tool.
Blue #0000ff
shipped4 real palettes, including Snapchat's brand system and Robinhood's brand system put Blue beside #f3ff0a, as the supporting colour.
Taupe #483c32
shippedTaupe is paired with #f3ff0a in 4 real palettes, including Calvin Klein's brand system and Tommy Hilfiger's brand system, as the lead colour.
Violet #ee82ee
split-complementshippedViolet is a split-complement of #f3ff0a: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Plum #dda0dd
complementaryPlum sits directly opposite #f3ff0a on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Charcoal #36454f
neutralshippedCharcoal is the body-text near-black for #f3ff0a: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy.
Crimson #dc143c
shippedCrimson is paired with #f3ff0a in 3 real palettes, including Ferrari's brand system and Lay's's brand system, as the lead colour.
Deep Pink #ff1493
shipped3 real palettes, including Arcade and JetBrains's brand system put Deep Pink beside #f3ff0a, as the lead colour.
Denim #1560bd
shippedDesigners have shipped Denim with #f3ff0a: 3 real palettes, including Ikea's brand system and FIFA's brand system, as the accent.
Real palettes that use #f3ff0a
Tints & shades
Harmonies
Contrast
| #f3ff0a as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 1.1:1 | fail | fail | fail | |
Aaon black | 19.12:1 | pass | pass | pass | Passes AAA — no fix needed. |
Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #f3ff0a as the background.
Brands using this color
Palettes built around it
mcpConnect your agent — build around #f3ff0a
live endpointPoint any MCP client at the shared colors endpoint and your agent gets the same engine as this page — direct_palette, edit_direction, check_palette, check_contrast — read-only, no key. Every direction it proposes comes with a /colors/d/… link: open it, lock what you like, paste the link back, and the agent edits rather than re-rolls.
endpoint
https://mcp.brandsweets.com/colors/mcpclaude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt
›analyze #f3ff0a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/f3ff0a-b9bea2-4e8ddf-262d1f-f1eee9?lock=0&style=vibrantWant the agent to remember your picks and write them into a living brand? Create a free BrandSweets workspace.
Machine-readable: color.md