Crayon Box
Open in tool →Red, teal and yellow at crayon saturation — joyful, but on white with black type so it stays readable for grown-ups.
Color
#31d3cb
#31d3cb
hex
#31d3cbrgb
rgb(49, 211, 203)hsl
hsl(177, 65%, 51%)oklch
oklch(0.787 0.127 189.8)Closest name: mediumturquoise (#48d1cc)Relative luminance 0.5155
Colors that go with #31d3cb
Charcoal, Deep Sky Blue and Dodger 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 #31d3cb: softer than #000 and cool enough to feel like part of the same palette.
Deep Sky Blue #00bfff
analogousshippedDeep Sky Blue is #31d3cb's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Dodger Blue #1e90ff
shippedDodger Blue is paired with #31d3cb in 4 real palettes, including Patreon's brand system and Unity's brand system, as the accent — a combination designers have actually shipped, not a computed rotation.
Royal Blue #4169e1
shippedRoyal Blue is paired with #31d3cb in 5 real palettes, including Docker's brand system and Khan Academy's brand system, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Taupe #483c32
shippedTaupe is paired with #31d3cb in 14 real palettes, including Crayon Box and Mint Chip, as the text colour against it — a combination designers have actually shipped, not a computed rotation.
Wheat #f5deb3
shippedWheat is paired with #31d3cb in 4 real palettes, including Mint Chip and Oatly's brand system, as the accent — a combination designers have actually shipped, not a computed rotation.
Light Coral #f08080
complementaryLight Coral sits directly opposite #31d3cb on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Blue #0000ff
shippedBlue is paired with #31d3cb in 3 real palettes, including Uber's brand system and Warp's brand system, as the accent — a combination designers have actually shipped, not a computed rotation.
Real palettes that use #31d3cb
Tints & shades
Harmonies
Contrast
| #31d3cb as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 1.86:1 | fail | fail | fail | |
Aaon black | 11.31:1 | 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 #31d3cb 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 #31d3cb
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 #31d3cb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/31d3cb-a2bcbe-d4599b-1f282d-e9f1ed?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