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
#effb0e
#effb0e
hex
#effb0ergb
rgb(239, 251, 14)hsl
hsl(63, 97%, 52%)oklch
oklch(0.947 0.21 113.3)Closest name: Banana Flash (#eefe02)Relative luminance 0.8738
Colors that go with #effb0e
Blue, Crimson and Taupe 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 #effb0e, as the supporting colour.
Crimson #dc143c
shippedCrimson is paired with #effb0e in 5 real palettes, including Ferrari's brand system and Lay's's brand system, as the lead colour.
Taupe #483c32
shippedTaupe is paired with #effb0e 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 #effb0e: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Plum #dda0dd
complementaryPlum sits directly opposite #effb0e 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 #effb0e: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy.
Deep Pink #ff1493
shipped3 real palettes, including Arcade and JetBrains's brand system put Deep Pink beside #effb0e, as the lead colour.
Denim #1560bd
shippedDesigners have shipped Denim with #effb0e: 3 real palettes, including Ikea's brand system and FIFA's brand system, as the accent.
Real palettes that use #effb0e
Tints & shades
Harmonies
Contrast
| #effb0e as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 1.14:1 | fail | fail | fail | |
Aaon black | 18.48:1 | 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 #effb0e as the background.
Brands using this color
No public brand in the corpus uses this exact color yet. Extract a brand to add one.
Palettes built around it
mcpConnect your agent — build around #effb0e
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 #effb0e and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/effb0e-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