Color
#40bf9f
#40bf9frgb(64, 191, 159)hsl(165, 50%, 50%)oklch(0.727 0.12 172.7)Colors that go with #40bf9f
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 #40bf9f: softer than #000 and cool enough to feel like part of the same palette.
Hot Pink #ff69b4
complementaryshippedHot Pink sits directly opposite #40bf9f on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Blue #0000ff
shipped4 real palettes, including Unity's brand system and Canva's brand system put Blue beside #40bf9f, as the supporting colour.
Crimson #dc143c
shippedCrimson is paired with #40bf9f in 4 real palettes, including DuckDuckGo's brand system and Riot Games's brand system, as the supporting colour.
Midnight Blue #191970
shipped5 real palettes, including Fintech Trust and Ford's brand system put Midnight Blue beside #40bf9f, as the text colour against it.
Mustard Yellow #ffdb58
shipped6 real palettes, including Crayon Box and Fresh Juice put Mustard Yellow beside #40bf9f, as the accent.
Royal Blue #4169e1
shippedRoyal Blue is paired with #40bf9f in 4 real palettes, including Khan Academy's brand system and Brilliant's brand system, as the accent.
Taupe #483c32
shippedTaupe is paired with #40bf9f in 18 real palettes, including Resort and Crayon Box, as the text colour against it.
Real palettes that use #40bf9f
Tints & shades
Harmonies
Contrast
| #40bf9f as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 2.29:1 | fail | fail | fail | |
Aaon black | 9.17:1 | 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 #40bf9f as the background.
Brands using this color
No public brand in the corpus uses this exact color yet. Extract a brand to add one.
Point 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.
https://mcp.brandsweets.com/colors/mcpclaude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
›analyze #40bf9f and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
/palettes/new/40bf9f-a2beba-d459b3-1f2b2d-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