Color
#a21310
#a21310rgb(162, 19, 16)hsl(1, 82%, 35%)oklch(0.455 0.176 28.5)Colors that go with #a21310
Royal Blue, Teal and Champagne 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.
Royal Blue #4169e1
triadicshippedRoyal Blue completes a triad with #a21310 — 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 #a21310 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Champagne #f7e7ce
shipped4 real palettes, including Woodsmoke and BrandSweets's brand system put Champagne beside #a21310, as the text colour against it.
Crimson #dc143c
shippedCrimson is paired with #a21310 in 6 real palettes, including State Farm's brand system and Wendy's's brand system, as the lead colour.
Dark Olive Green #556b2f
shippedDark Olive Green shows up next to #a21310 in 4 real palettes, including Cider and Olive Grove, as the accent.
Denim #1560bd
shippedDesigners have shipped Denim with #a21310: 6 real palettes, including State Farm's brand system and Campbell's's brand system, as the accent.
Goldenrod #daa520
shippedGoldenrod shows up next to #a21310 in 4 real palettes, including Fireside and Candlelight, as the accent.
Charcoal #36454f
neutralshippedCharcoal is the body-text near-black for #a21310: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy.
Real palettes that use #a21310
Tints & shades
Harmonies
Contrast
| #a21310 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 7.96:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 2.64:1 | fail | fail | fail |
Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #a21310 as the background.
Brands using this color
Fonts for this mood
#a21310 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 #a21310 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/a21310-c4a19c-62cb9a-2d261f-f1e9ed?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