Chalkboard
Open in tool →Slate green with chalk cream and a coral — nostalgic without being twee.
Color
#172b2b
#172b2b
hex
#172b2brgb
rgb(23, 43, 43)hsl
hsl(180, 30%, 13%)oklch
oklch(0.272 0.026 195.7)Closest name: Black Pearl (#1e272c)Relative luminance 0.0208
Colors that go with #172b2b
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 #172b2b without the hard edge of pure #000.
Amber #ffbf00
shippedAmber is paired with #172b2b in 18 real palettes, including Beach Hut and McDonald's's brand system, as the supporting colour.
Blue #0000ff
shipped24 real palettes, including Readymag's brand system and Headspace's brand system put Blue beside #172b2b, as the supporting colour.
Blue Violet #8a2be2
shippedBlue Violet is paired with #172b2b in 8 real palettes, including ClickUp's brand system and Yahoo's brand system, as the lead colour.
Blush Pink #e8b4b8
shipped7 real palettes, including Rain Garden and Graphite Mono put Blush Pink beside #172b2b, as the accent.
Brown #a52a2a
shipped4 real palettes, including Typewriter and Woodsmoke put Brown beside #172b2b, as the accent.
Burlywood #deb887
shippedBurlywood is paired with #172b2b in 5 real palettes, including Chalkboard and Coastal, as the lead colour.
Cadet Blue #5f9ea0
shippedDesigners have shipped Cadet Blue with #172b2b: 10 real palettes, including Paper & Pine and Dusk, as the supporting colour.
Real palettes that use #172b2b
Tints & shades
Harmonies
Contrast
| #172b2b as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 14.82:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.42:1 | 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 #172b2b 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
Fonts for this mood
#172b2b reads as cool, muted, dark. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #172b2b
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 #172b2b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/172b2b-a2bbbe-d45994-1f272d-e9f1ed?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