Color
#ef542a
#ef542argb(239, 84, 42)hsl(13, 86%, 55%)oklch(0.651 0.198 35.6)Colors that go with #ef542a
Cadet Blue, Charcoal and Amber 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.
Cadet Blue #5f9ea0
complementaryshippedCadet Blue sits directly opposite #ef542a 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 #ef542a: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy.
Amber #ffbf00
shippedAmber is paired with #ef542a in 8 real palettes, including Ember and Heatwave, as the accent.
Blue #0000ff
shipped8 real palettes, including Glossier's brand system and Readymag's brand system put Blue beside #ef542a, as the accent.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with #ef542a: 5 real palettes, including Tide's brand system and NASA's brand system, as the lead colour.
Crimson #dc143c
shippedCrimson is paired with #ef542a in 8 real palettes, including Pizza Hut's brand system and Redfin's brand system, as the supporting colour.
Denim #1560bd
shippedDesigners have shipped Denim with #ef542a: 15 real palettes, including PlanetScale's brand system and Strava's brand system, as the accent.
Dodger Blue #1e90ff
shippedDesigners have shipped Dodger Blue with #ef542a: 8 real palettes, including Figma's brand system and Replit's brand system, as the accent.
Real palettes that use #ef542a
Tints & shades
Harmonies
Contrast
| #ef542a as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 3.52:1 | fail | pass | fail | |
Aaon black | 5.97:1 | pass | pass | fail |
|
Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #ef542a as the background.
Brands using this color
Fonts for this mood
#ef542a reads as warm, vivid, playful. The font library is tagged with the same vocabulary:
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 #ef542a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/ef542a-c4a99c-62cbaf-2d281f-f1e9eb?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