Undergrowth
Open in tool →Fern and lichen with a fungus orange on a fir-black — the forest floor at dusk, as a dark theme.
Color
#51675b
#51675b
hex
#51675brgb
rgb(81, 103, 91)hsl
hsl(147, 12%, 36%)oklch
oklch(0.492 0.033 161.1)Closest name: Dark Forest (#556962)Relative luminance 0.1221
Colors that go with #51675b
Charcoal, Cadet 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 text near-black for #51675b: softer than #000 and cool enough to feel like part of the same palette.
Cadet Blue #5f9ea0
shippedDesigners have shipped Cadet Blue with #51675b: 4 real palettes, including Alpine and Dusk, as the supporting colour.
Champagne #f7e7ce
shipped5 real palettes, including BrandSweets's brand system and Darkroom put Champagne beside #51675b.
Copper #b87333
shippedDesigners have shipped Copper with #51675b: 6 real palettes, including Desert Road and Clay & Linen, as the lead colour.
Crimson #dc143c
shippedCrimson is paired with #51675b in 7 real palettes, including Gemstone and Five Guys's brand system, as the accent.
Denim #1560bd
shippedDesigners have shipped Denim with #51675b: 7 real palettes, including HP's brand system and Campus, as the accent.
Goldenrod #daa520
shippedGoldenrod shows up next to #51675b in 5 real palettes, including Mid-Century and Fireside, as the accent.
Rose Gold #b76e79
complementaryRose Gold sits directly opposite #51675b 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 #51675b
Tints & shades
Harmonies
Contrast
| #51675b as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 6.1:1 | pass | pass | fail |
|
Aaon black | 3.44:1 | 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 #51675b as the background.
Brands using this color
No public brand in the corpus uses this exact color yet. Extract a brand to add one.
Palettes built around it
mcpConnect your agent — build around #51675b
live endpointPoint 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.
endpoint
https://mcp.brandsweets.com/colors/mcpclaude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt
›analyze #51675b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/51675b-a2beb2-d059d4-1f2d2c-eaf1e9?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