Chalkboard
Open in tool →Slate green with chalk cream and a coral — nostalgic without being twee.
Color
#152d21
#152d21
hex
#152d21rgb
rgb(21, 45, 33)hsl
hsl(150, 36%, 13%)oklch
oklch(0.273 0.038 160.7)Closest name: Pitch-Black Forests (#003322)Relative luminance 0.0215
Colors that go with #152d21
Charcoal, Sea 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 #152d21: softer than #000 and cool enough to feel like part of the same palette.
Sea Green #2e8b57
analogousshippedSea Green is #152d21'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 #152d21 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Slate Blue #6a5acd
triadicshippedSlate Blue completes a triad with #152d21 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Teal #008080
analogousshippedTeal is #152d21's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Medium Violet Red #c71585
complementaryshippedMedium Violet Red sits directly opposite #152d21 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 #152d21 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 Headspace's brand system put Blue beside #152d21, as the supporting colour.
Real palettes that use #152d21
Tints & shades
Harmonies
Contrast
| #152d21 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 14.69:1 | 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 #152d21 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
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
#152d21 reads as dark, luxury, bold. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #152d21
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 #152d21 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/152d21-a2beb3-d459d2-1f2d2c-e9f1ea?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