Chalkboard
Open in tool →Slate green with chalk cream and a coral — nostalgic without being twee.
Color
#18282b
#18282b
hex
#18282brgb
rgb(24, 40, 43)hsl
hsl(189, 28%, 13%)oklch
oklch(0.264 0.022 210.5)Closest name: Black Pearl (#1e272c)Relative luminance 0.0189
Colors that go with #18282b
Charcoal, Amber and 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 that reads cleanly against #18282b without the hard edge of pure #000.
Amber #ffbf00
shippedAmber is paired with #18282b in 18 real palettes, including Beach Hut and Wikipedia's brand system, as the supporting colour.
Blue #0000ff
shipped23 real palettes, including Readymag's brand system and Rolex's brand system put Blue beside #18282b, as the supporting colour.
Blue Violet #8a2be2
shippedBlue Violet is paired with #18282b in 9 real palettes, including ClickUp's brand system and Yahoo's brand system, as the lead colour.
Blush Pink #e8b4b8
shipped6 real palettes, including Graphite Mono and Rain Garden put Blush Pink beside #18282b, as the accent.
Brown #a52a2a
shipped5 real palettes, including Typewriter and Woodsmoke put Brown beside #18282b, as the accent.
Burlywood #deb887
shippedBurlywood is paired with #18282b in 6 real palettes, including Chalkboard and Coastal, as the lead colour.
Cadet Blue #5f9ea0
shippedDesigners have shipped Cadet Blue with #18282b: 10 real palettes, including Paper & Pine and Dusk, as the supporting colour.
Real palettes that use #18282b
Tints & shades
Harmonies
Contrast
| #18282b as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 15.25:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.38:1 | 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 #18282b as the background.
Brands using this color
- Subarutext · #1d252c · Δ1.321
- 7-Elevenprimary · #212529 · Δ1.583
- 7-Eleventext · #212529 · Δ1.583
- AMDprimary · #212529 · Δ1.583
- AMDtext · #212529 · Δ1.583
- Boeingtext · #212529 · Δ1.583
- Calvin Kleinprimary · #212529 · Δ1.583
- Calvin Kleintext · #212529 · Δ1.583
- Datadogtext · #212529 · Δ1.583
- Tommy Hilfigerprimary · #212529 · Δ1.583
- Tommy Hilfigertext · #212529 · Δ1.583
- Trader Joe'sprimary · #212529 · Δ1.583
- Trader Joe'stext · #212529 · Δ1.583
- AT&Tprimary · #1d2329 · Δ1.787
- AT&Ttext · #1d2329 · Δ1.787
- American Eagleprimary · #24272a · Δ1.843
- American Eagletext · #24272a · Δ1.843
- GitHubtext · #1f2328 · Δ1.876
Palettes built around it
Fonts for this mood
#18282b reads as cool, muted, dark. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #18282b
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 #18282b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/18282b-a2b7be-df4e7e-1f252d-e9f1ee?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