Graphite
Open in tool →A greyscale system with a single amber — the accent does all the work, so allow one per screen.
Color
#ef9f0b
#ef9f0b
hex
#ef9f0brgb
rgb(239, 159, 11)hsl
hsl(39, 91%, 49%)oklch
oklch(0.763 0.161 72.8)Closest name: orange (#ffa500)Relative luminance 0.4317
Colors that go with #ef9f0b
Charcoal, Deep Sky Blue and Blue 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 #ef9f0b: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy.
Deep Sky Blue #00bfff
complementaryshippedDeep Sky Blue sits directly opposite #ef9f0b on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Blue #0000ff
shipped4 real palettes, including Binance's brand system and League of Legends's brand system put Blue beside #ef9f0b, as the accent.
Champagne #f7e7ce
shipped6 real palettes, including Forest Floor and Midnight Luxe put Champagne beside #ef9f0b, as that palette's text colour.
Cornflower Blue #6495ed
shippedDesigners have shipped Cornflower Blue with #ef9f0b: 6 real palettes, including Gopro's brand system and Ahrefs's brand system, as the supporting colour.
Crimson #dc143c
shippedCrimson is paired with #ef9f0b in 6 real palettes, including Tequila Sunrise and Retro Pop, as the lead colour.
Dark Olive Green #556b2f
shippedDark Olive Green shows up next to #ef9f0b in 5 real palettes, including Farmers Market and Forest Floor, as the supporting colour.
Denim #1560bd
shippedDesigners have shipped Denim with #ef9f0b: 10 real palettes, including Campus and Gopro's brand system, as the lead colour.
Real palettes that use #ef9f0b
Tints & shades
Harmonies
Contrast
| #ef9f0b as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 2.18:1 | fail | fail | fail | |
Aaon black | 9.63:1 | 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 #ef9f0b as the background.
Brands using this color
Palettes built around it
Mint Modern
Open in tool →Emerald as a primary rather than a success color, anchored by deep teal text — fresh, friendly, and fintech-adjacent.
Campus
Open in tool →Institutional blue with a highlighter-amber accent — trustworthy for parents, lively enough for students.
Fonts for this mood
#ef9f0b reads as warm, vivid, playful. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #ef9f0b
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 #ef9f0b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/ef9f0b-c4ba9c-62b9cb-2c2d1f-f1ebe9?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