Color
#51817a
#51817argb(81, 129, 122)hsl(171, 23%, 41%)oklch(0.567 0.053 184.2)Colors that go with #51817a
Charcoal, Champagne and Cobalt Blue 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 text near-black for #51817a: softer than #000 and cool enough to feel like part of the same palette.
Champagne #f7e7ce
shipped5 real palettes, including Forest Floor and Coffee Bar put Champagne beside #51817a, as that palette's text colour.
Cobalt Blue #0047ab
shippedDesigners have shipped Cobalt Blue with #51817a: 5 real palettes, including Ink & Paper and Intel's brand system, as the accent.
Copper #b87333
shippedDesigners have shipped Copper with #51817a: 6 real palettes, including Riverbed and Wellness, as the accent.
Crimson #dc143c
shippedCrimson is paired with #51817a in 8 real palettes, including Redfin's brand system and Five Guys's brand system, as the lead colour.
Denim #1560bd
shippedDesigners have shipped Denim with #51817a: 11 real palettes, including Campus and Peacock, as the lead colour.
Firebrick #b22222
shippedDesigners have shipped Firebrick with #51817a: 4 real palettes, including Newsprint and Wendy's's brand system, as the lead colour.
Rose Gold #b76e79
complementaryRose Gold sits directly opposite #51817a on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Real palettes that use #51817a
Tints & shades
Harmonies
Contrast
| #51817a as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 4.4:1 | fail | pass | fail | |
Aaon black | 4.77:1 | 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 #51817a as the background.
Brands using this color
No public brand in the corpus uses this exact color yet. Extract a brand to add one.
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 #51817a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/51817a-a2bebd-d459a7-1f292d-e9f1ec?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