Color
#518151
#518151rgb(81, 129, 81)hsl(120, 23%, 41%)oklch(0.556 0.09 144.2)Colors that go with #518151
Charcoal, Blue 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.
Charcoal #36454f
neutralshippedCharcoal is the body-text near-black for #518151: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy.
Blue #0000ff
shipped4 real palettes, including Kia's brand system and Warp's brand system put Blue beside #518151, as the accent.
Champagne #f7e7ce
shipped5 real palettes, including Forest Floor and Woodsmoke put Champagne beside #518151, as that palette's text colour.
Copper #b87333
shippedDesigners have shipped Copper with #518151: 5 real palettes, including Wellness and Riverbed, as the supporting colour.
Crimson #dc143c
shippedCrimson is paired with #518151 in 6 real palettes, including Five Guys's brand system and Netflix's brand system, as the supporting colour.
Denim #1560bd
shippedDesigners have shipped Denim with #518151: 7 real palettes, including Intel's brand system and Jack Daniel's's brand system, as the supporting colour.
Midnight Blue #191970
shipped4 real palettes, including Paramount+'s brand system and Tide Pool put Midnight Blue beside #518151, as the supporting colour.
Steel Blue #4682b4
triadicshippedSteel Blue completes a triad with #518151 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Real palettes that use #518151
Tints & shades
Harmonies
Contrast
| #518151 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 4.56:1 | pass | pass | fail |
|
Aaon black | 4.61:1 | 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 #518151 as the background.
Brands using this color
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 #518151 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/518151-a2bea5-994edf-1f2d25-edf1e9?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