Heatwave
Open in tool →Blaze orange and hot yellow with one cold blue — the high-noon palette; use the blue where the eye needs to rest.
Color
#fc5331
#fc5331
hex
#fc5331rgb
rgb(252, 83, 49)hsl
hsl(10, 97%, 59%)oklch
oklch(0.671 0.211 33.2)Closest name: orangered (#ff4500)Relative luminance 0.271
Colors that go with #fc5331
Charcoal, Cadet Blue 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.
Charcoal #36454f
neutralshippedCharcoal is the body-text near-black for #fc5331: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy.
Cadet Blue #5f9ea0
complementaryshippedCadet Blue sits directly opposite #fc5331 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Amber #ffbf00
shippedAmber is paired with #fc5331 in 6 real palettes, including Heatwave and Ember, as the supporting colour.
Blue #0000ff
shipped7 real palettes, including Monzo's brand system and Readymag's brand system put Blue beside #fc5331, as the accent.
Crimson #dc143c
shippedCrimson is paired with #fc5331 in 6 real palettes, including Wise's brand system and Snyk's brand system, as the accent.
Denim #1560bd
shippedDesigners have shipped Denim with #fc5331: 10 real palettes, including Strava's brand system and Soundcloud's brand system, as the accent.
Dodger Blue #1e90ff
shippedDesigners have shipped Dodger Blue with #fc5331: 7 real palettes, including Heatwave and Readymag's brand system, as the accent.
Firebrick #b22222
shippedDesigners have shipped Firebrick with #fc5331: 4 real palettes, including Ember and Maple, as the supporting colour.
Real palettes that use #fc5331
Tints & shades
Harmonies
Contrast
| #fc5331 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 3.27:1 | fail | pass | fail | |
Aaon black | 6.42:1 | 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 #fc5331 as the background.
Brands using this color
Palettes built around it
Fonts for this mood
#fc5331 reads as warm, vivid, playful. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #fc5331
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 #fc5331 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/fc5331-c4a79c-62cbaa-2d281f-f1e9ec?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