Launch Orange
Open in tool →Orange is the rarest SaaS primary, which is exactly why it stands out on a pricing page; cyan keeps it from feeling like a hardware store.
Color
#ef531f
#ef531f
hex
#ef531frgb
rgb(239, 83, 31)hsl
hsl(15, 87%, 53%)oklch
oklch(0.649 0.201 37.1)Closest name: Baptism by Fire (#e6490b)Relative luminance 0.2464
Colors that go with #ef531f
Cadet Blue, Charcoal and Dodger 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.
Cadet Blue #5f9ea0
complementaryshippedCadet Blue sits directly opposite #ef531f 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 #ef531f: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy.
Dodger Blue #1e90ff
split-complementshippedDodger Blue is a split-complement of #ef531f: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Amber #ffbf00
shippedAmber is paired with #ef531f 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 #ef531f, as the accent.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with #ef531f: 5 real palettes, including Tide's brand system and NASA's brand system, as the lead colour.
Crimson #dc143c
shippedCrimson is paired with #ef531f 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 #ef531f: 15 real palettes, including PlanetScale's brand system and Strava's brand system, as the accent.
Real palettes that use #ef531f
Tints & shades
Harmonies
Contrast
| #ef531f as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 3.54:1 | fail | pass | fail | |
Aaon black | 5.93:1 | 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 #ef531f as the background.
Brands using this color
Palettes built around it
Fonts for this mood
#ef531f reads as warm, vivid, playful. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #ef531f
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 #ef531f and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/ef531f-c4ab9c-62cbb2-2d291f-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