Color
#eff939
#eff939rgb(239, 249, 57)hsl(63, 94%, 60%)oklch(0.944 0.196 112.7)Colors that go with #eff939
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 #eff939: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy.
Crimson #dc143c
shippedCrimson is paired with #eff939 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 #eff939 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 #eff939 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 #eff939: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Plum #dda0dd
complementaryPlum sits directly opposite #eff939 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Blue #0000ff
shippedBlue is paired with #eff939 in 3 real palettes, including Robinhood's brand system and Bumble's brand system, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Cornflower Blue #6495ed
split-complementshippedCornflower Blue is a split-complement of #eff939: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Real palettes that use #eff939
Tints & shades
Harmonies
Contrast
| #eff939 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 1.15:1 | fail | fail | fail | |
Aaon black | 18.28:1 | 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 #eff939 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 #eff939 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/eff939-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