Color
#a81900
#a81900rgb(168, 25, 0)hsl(9, 100%, 33%)oklch(0.47 0.179 31.8)Colors that go with #a81900
Royal Blue, 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.
Royal Blue #4169e1
triadicshippedRoyal Blue completes a triad with #a81900 — 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 #a81900 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 #a81900 in 4 real palettes, including Ember and Maple, as the accent.
Crimson #dc143c
shippedCrimson is paired with #a81900 in 8 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 #a81900 in 4 real palettes, including Olive Grove and Cider, as the lead colour.
Denim #1560bd
shippedDesigners have shipped Denim with #a81900: 9 real palettes, including State Farm's brand system and Campbell's's brand system, as the accent.
Goldenrod #daa520
shippedGoldenrod shows up next to #a81900 in 4 real palettes, including Fireside and Noir Beauty, as the accent.
Charcoal #36454f
neutralshippedCharcoal is the body-text near-black for #a81900: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy.
Real palettes that use #a81900
Tints & shades
Harmonies
Contrast
| #a81900 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 7.49:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 2.8:1 | 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 #a81900 as the background.
Brands using this color
Fonts for this mood
#a81900 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 #a81900 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/a81900-c4a79c-62cba8-2d271f-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