Chalkboard
Open in tool →Slate green with chalk cream and a coral — nostalgic without being twee.
Color
#152c2d
#152c2d
hex
#152c2drgb
rgb(21, 44, 45)hsl
hsl(183, 36%, 13%)oklch
oklch(0.275 0.029 199.2)Closest name: Black Box (#0f282f)Relative luminance 0.0215
Colors that go with #152c2d
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 #152c2d without the hard edge of pure #000.
Amber #ffbf00
shippedAmber is paired with #152c2d 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 #152c2d, as the supporting colour.
Blue Violet #8a2be2
shippedBlue Violet is paired with #152c2d 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 #152c2d, as the accent.
Brown #a52a2a
shipped4 real palettes, including Typewriter and Woodsmoke put Brown beside #152c2d, as the accent.
Burlywood #deb887
shippedBurlywood is paired with #152c2d in 5 real palettes, including Chalkboard and Coastal, as the lead colour.
Cadet Blue #5f9ea0
shippedDesigners have shipped Cadet Blue with #152c2d: 10 real palettes, including Coastal and Paper & Pine, as the lead colour.
Real palettes that use #152c2d
Tints & shades
Harmonies
Contrast
| #152c2d as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 14.68:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.43:1 | 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 #152c2d 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
#152c2d reads as cool, dark, luxury. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #152c2d
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 #152c2d and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/152c2d-a2b9be-d4598e-1f262d-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