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
#516c55
#516c55
hex
#516c55rgb
rgb(81, 108, 85)hsl
hsl(129, 14%, 37%)oklch
oklch(0.503 0.048 148.9)Closest name: Cactus (#5b6f55)Relative luminance 0.1313
Colors that go with #516c55
Charcoal, Champagne and Copper 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 #516c55: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy.
Champagne #f7e7ce
shipped6 real palettes, including BrandSweets's brand system and Forest Floor put Champagne beside #516c55.
Copper #b87333
shippedDesigners have shipped Copper with #516c55: 5 real palettes, including Clay & Linen and Riverbed, as the lead colour.
Crimson #dc143c
shippedCrimson is paired with #516c55 in 6 real palettes, including Gemstone and Five Guys's brand system, as the accent.
Denim #1560bd
shippedDesigners have shipped Denim with #516c55: 8 real palettes, including Intel's brand system and Jack Daniel's's brand system, as the supporting colour.
Goldenrod #daa520
shippedGoldenrod shows up next to #516c55 in 5 real palettes, including Mid-Century and Fireside, as the accent.
Medium Sea Green #3cb371
shippedMedium Sea Green is paired with #516c55 in 4 real palettes, including Undergrowth and Indigo SaaS, as the lead colour.
Slate Blue #6a5acd
split-complementshippedSlate Blue is a split-complement of #516c55: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Real palettes that use #516c55
Tints & shades
Harmonies
Contrast
| #516c55 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 5.79:1 | pass | pass | fail |
|
Aaon black | 3.63:1 | 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 #516c55 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 #516c55
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 #516c55 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/516c55-a2bea9-ae4edf-1f2d27-ecf1e9?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