Peacock
Open in tool →Teal, cobalt and magenta at full chroma on white — jewel tones in daylight; the trick is a near-black text with a blue cast.
Color
#288f81
#288f81
hex
#288f81rgb
rgb(40, 143, 129)hsl
hsl(172, 56%, 36%)oklch
oklch(0.589 0.094 181.9)Closest name: Highlands (#449084)Relative luminance 0.2168
Colors that go with #288f81
Charcoal, Copper and Crimson 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 #288f81: softer than #000 and cool enough to feel like part of the same palette.
Copper #b87333
triadicshippedCopper completes a triad with #288f81 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Crimson #dc143c
split-complementshippedCrimson is a split-complement of #288f81: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Medium Violet Red #c71585
complementaryshippedMedium Violet Red sits directly opposite #288f81 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Denim #1560bd
shippedDesigners have shipped Denim with #288f81: 7 real palettes, including Peacock and Intel's brand system, as the supporting colour.
Goldenrod #daa520
shippedGoldenrod shows up next to #288f81 in 4 real palettes, including Mid-Century and Sapphire & Gold, as the accent.
Midnight Blue #191970
shipped7 real palettes, including Tide Pool and Paramount+'s brand system put Midnight Blue beside #288f81, as that palette's text colour.
Orange #ffa500
shipped4 real palettes, including Campus and Farmers Market put Orange beside #288f81, as the accent.
Real palettes that use #288f81
Tints & shades
Harmonies
Contrast
| #288f81 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 3.94:1 | fail | pass | fail | |
Aaon black | 5.34:1 | pass | pass | fail |
|
Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #288f81 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
mcpConnect your agent — build around #288f81
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 #288f81 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/288f81-a2bebe-d459a5-1f292d-e9f1ec?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