Ledger Dark
Open in tool →Gold on midnight is the private-banking cue; the mint accent keeps it from feeling old-money stuffy.
Color
#3fd599
#3fd599
hex
#3fd599rgb
rgb(63, 213, 153)hsl
hsl(156, 64%, 54%)oklch
oklch(0.78 0.152 162)Closest name: Envy’s Love (#2dd78d)Relative luminance 0.5095
Colors that go with #3fd599
Charcoal, Hot Pink and Deep Sky 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 #3fd599: softer than #000 and cool enough to feel like part of the same palette.
Hot Pink #ff69b4
complementaryshippedHot Pink sits directly opposite #3fd599 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Deep Sky Blue #00bfff
shippedDeep Sky Blue is paired with #3fd599 in 4 real palettes, including Remix's brand system and Prime Video's brand system, as the lead colour — a combination designers have actually shipped, not a computed rotation.
Mustard Yellow #ffdb58
shippedMustard Yellow is paired with #3fd599 in 4 real palettes, including Fresh Juice and Crayon Box, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Taupe #483c32
shippedTaupe is paired with #3fd599 in 13 real palettes, including WhatsApp's brand system and 7-Eleven's brand system, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Light Coral #f08080
split-complementshippedLight Coral is a split-complement of #3fd599: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Dark Olive Green #556b2f
shippedDark Olive Green is paired with #3fd599 in 3 real palettes, including 7-Eleven's brand system and Undergrowth, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Dark Orange #ff8c00
shippedDark Orange is paired with #3fd599 in 3 real palettes, including Playground and Citrus Grove, as the lead colour — a combination designers have actually shipped, not a computed rotation.
Real palettes that use #3fd599
Tints & shades
Harmonies
Contrast
| #3fd599 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 1.88:1 | fail | fail | fail | |
Aaon black | 11.19:1 | 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 #3fd599 as the background.
Brands using this color
Palettes built around it
mcpConnect your agent — build around #3fd599
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 #3fd599 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/3fd599-a2beb6-d459c6-1f2d2d-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