Noir Beauty
Open in tool →Black, gold and one deep red — the prestige cosmetics counter: all restraint and a single lipstick.
Color
#ca3521
#ca3521
hex
#ca3521rgb
rgb(202, 53, 33)hsl
hsl(7, 72%, 46%)oklch
oklch(0.556 0.189 31)Closest name: Bento Box (#cc363c)Relative luminance 0.1521
Colors that go with #ca3521
Charcoal, Royal Blue and Sea Green 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 #ca3521: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy.
Royal Blue #4169e1
triadicshippedRoyal Blue completes a triad with #ca3521 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Sea Green #2e8b57
triadicshippedSea Green completes a triad with #ca3521 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Steel Blue #4682b4
split-complementshippedSteel Blue is a split-complement of #ca3521: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Teal #008080
complementaryshippedTeal sits directly opposite #ca3521 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 #ca3521 in 7 real palettes, including Trailhead and McDonald's's brand system, as the accent.
Blue #0000ff
shipped6 real palettes, including Tim Hortons's brand system and Doordash's brand system put Blue beside #ca3521, as the accent.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with #ca3521: 5 real palettes, including Behance's brand system and Walgreens's brand system, as the supporting colour.
Real palettes that use #ca3521
Tints & shades
Harmonies
Contrast
| #ca3521 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 5.19:1 | pass | pass | fail |
|
Aaon black | 4.04:1 | fail | 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 #ca3521 as the background.
Brands using this color
Palettes built around it
Fonts for this mood
#ca3521 reads as warm, vivid, playful. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #ca3521
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 #ca3521 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/ca3521-c4a59c-62cba4-2d271f-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