Ledger Dark
Open in tool →Gold on midnight is the private-banking cue; the mint accent keeps it from feeling old-money stuffy.
Color
#40ce9f
#40ce9f
hex
#40ce9frgb
rgb(64, 206, 159)hsl
hsl(160, 59%, 53%)oklch
oklch(0.764 0.139 166.6)Closest name: mediumaquamarine (#66cdaa)Relative luminance 0.4774
Colors that go with #40ce9f
Charcoal, Hot Pink 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 for #40ce9f: softer than #000 and cool enough to feel like part of the same palette.
Hot Pink #ff69b4
complementaryshippedHot Pink sits directly opposite #40ce9f on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Blue #0000ff
shipped5 real palettes, including Unity's brand system and Canva's brand system put Blue beside #40ce9f, as the supporting colour.
Crimson #dc143c
shippedCrimson is paired with #40ce9f in 4 real palettes, including Tiffany & Co.'s brand system and DuckDuckGo's brand system, as the supporting colour.
Mustard Yellow #ffdb58
shipped4 real palettes, including Fresh Juice and Crayon Box put Mustard Yellow beside #40ce9f, as the supporting colour.
Taupe #483c32
shippedTaupe is paired with #40ce9f in 19 real palettes, including Chime's brand system and Crayon Box, as the lead colour.
Wheat #f5deb3
shippedDesigners have shipped Wheat with #40ce9f: 4 real palettes, including Resort and Mint Chip, as the accent.
Light Coral #f08080
split-complementshippedLight Coral is a split-complement of #40ce9f: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Real palettes that use #40ce9f
Tints & shades
Harmonies
Contrast
| #40ce9f as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 1.99:1 | fail | fail | fail | |
Aaon black | 10.55:1 | pass | pass | pass | Passes AAA — no fix needed. |
Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #40ce9f as the background.
Brands using this color
Palettes built around it
mcpConnect your agent — build around #40ce9f
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 #40ce9f and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/40ce9f-a2beb8-d459be-1f2c2d-e9f1eb?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