Color
#efef01
#efef01rgb(239, 239, 1)hsl(60, 99%, 47%)oklch(0.922 0.201 109.8)Colors that go with #efef01
Charcoal, 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.
Charcoal #36454f
neutralshippedCharcoal is the body-text near-black for #efef01: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy.
Crimson #dc143c
shippedCrimson is paired with #efef01 in 5 real palettes, including Lay's's brand system and Tequila Sunrise, as the accent — a combination designers have actually shipped, not a computed rotation.
Taupe #483c32
shippedTaupe is paired with #efef01 in 4 real palettes, including Crayon Box and Citrus Grove, as the text colour against it — a combination designers have actually shipped, not a computed rotation.
Tomato #ff6347
shippedTomato is paired with #efef01 in 4 real palettes, including Crayon Box and Night Market, as the lead colour — a combination designers have actually shipped, not a computed rotation.
Violet #ee82ee
split-complementshippedViolet is a split-complement of #efef01: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Lilac #c8a2c8
complementaryLilac sits directly opposite #efef01 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Deep Sky Blue #00bfff
split-complementshippedDeep Sky Blue is a split-complement of #efef01: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Deep Pink #ff1493
shippedDeep Pink is paired with #efef01 in 3 real palettes, including Arcade and JetBrains's brand system, as the lead colour — a combination designers have actually shipped, not a computed rotation.
Real palettes that use #efef01
Tints & shades
Harmonies
Contrast
| #efef01 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 1.23:1 | fail | fail | fail | |
Aaon black | 17.02:1 | 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 #efef01 as the background.
Brands using this color
Point 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.
https://mcp.brandsweets.com/colors/mcpclaude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
›analyze #efef01 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/efef01-bbbea2-4e94df-272d1f-f1ede9?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