Color
#b21048
#b21048rgb(178, 16, 72)hsl(339, 84%, 38%)oklch(0.493 0.19 10.1)Colors that go with #b21048
Denim, Teal 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.
Denim #1560bd
triadicshippedDenim completes a triad with #b21048 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Teal #008080
complementaryshippedTeal sits directly opposite #b21048 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 #b21048 in 4 real palettes, including Maple and Ember, as the accent.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with #b21048: 4 real palettes, including MLB's brand system and Behance's brand system, as the accent.
Royal Blue #4169e1
shippedRoyal Blue is paired with #b21048 in 7 real palettes, including Chase's brand system and Bose's brand system, as the supporting colour.
Sea Green #2e8b57
split-complementshippedSea Green is a split-complement of #b21048: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Slate Gray #708090
shipped4 real palettes, including Newsprint and Typewriter put Slate Gray beside #b21048, as the supporting colour.
Charcoal #36454f
neutralshippedCharcoal is the body-text near-black for #b21048: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy.
Real palettes that use #b21048
Tints & shades
Harmonies
Contrast
| #b21048 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 6.86:1 | pass | pass | fail |
|
Aaon black | 3.06:1 | 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 #b21048 as the background.
Brands using this color
No public brand in the corpus uses this exact color yet. Extract a brand to add one.
Fonts for this mood
#b21048 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 #b21048 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/b21048-c49ca5-62cb74-2d211f-f1e9f0?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