Chalkboard
Open in tool →Slate green with chalk cream and a coral — nostalgic without being twee.
Color
#182a1f
#182a1f
hex
#182a1frgb
rgb(24, 42, 31)hsl
hsl(143, 27%, 13%)oklch
oklch(0.265 0.032 156.7)Closest name: Underworld (#1e231c)Relative luminance 0.0195
Colors that go with #182a1f
Charcoal, Dark Olive Green and Sienna 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 #182a1f: softer than #000 and cool enough to feel like part of the same palette.
Dark Olive Green #556b2f
analogousshippedDark Olive Green is #182a1f's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Sienna #a0522d
triadicshippedSienna completes a triad with #182a1f — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Slate Blue #6a5acd
split-complementshippedSlate Blue is a split-complement of #182a1f: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Teal #008080
analogousshippedTeal is #182a1f's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Rose Gold #b76e79
complementaryshippedRose Gold sits directly opposite #182a1f 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 #182a1f in 18 real palettes, including McDonald's's brand system and Wikipedia's brand system, as the lead colour.
Blue #0000ff
shipped23 real palettes, including Readymag's brand system and Rolex's brand system put Blue beside #182a1f, as the supporting colour.
Real palettes that use #182a1f
Tints & shades
Harmonies
Contrast
| #182a1f as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 15.11:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.39:1 | 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 #182a1f 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
Riverbed
Open in tool →Wet-stone green and pebble grey with a copper accent — an earth palette that leans cool, for outdoor and wellness.
Meadow
Open in tool →Fresh green, buttercup and a wildflower pink — spring at full saturation; the leaf-dark text does the anchoring.
Undergrowth
Open in tool →Fern and lichen with a fungus orange on a fir-black — the forest floor at dusk, as a dark theme.
Fonts for this mood
#182a1f reads as muted, dark, luxury. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #182a1f
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 #182a1f and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/182a1f-a2beb0-c859d4-1f2d2b-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