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
#39cbd0
#39cbd0
hex
#39cbd0rgb
rgb(57, 203, 208)hsl
hsl(182, 62%, 52%)oklch
oklch(0.77 0.119 198.4)Closest name: darkturquoise (#00ced1)Relative luminance 0.4814
Colors that go with #39cbd0
Charcoal, Light Coral 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 #39cbd0: softer than #000 and cool enough to feel like part of the same palette.
Light Coral #f08080
complementaryshippedLight Coral sits directly opposite #39cbd0 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Dodger Blue #1e90ff
shippedDesigners have shipped Dodger Blue with #39cbd0: 4 real palettes, including Patreon's brand system and Figma's brand system, as the accent.
Midnight Blue #191970
shipped5 real palettes, including Confluent's brand system and Telehealth put Midnight Blue beside #39cbd0, as the lead colour.
Royal Blue #4169e1
shippedRoyal Blue is paired with #39cbd0 in 7 real palettes, including Docker's brand system and Khan Academy's brand system, as the supporting colour.
Slate Gray #708090
shipped4 real palettes, including Ledger Dark and Still Water put Slate Gray beside #39cbd0, as the supporting colour.
Steel Blue #4682b4
shippedDesigners have shipped Steel Blue with #39cbd0: 4 real palettes, including Deep Water and Astro's brand system, as the supporting colour.
Taupe #483c32
shippedTaupe is paired with #39cbd0 in 14 real palettes, including Crayon Box and Boeing's brand system, as the text colour against it.
Real palettes that use #39cbd0
Tints & shades
Harmonies
Contrast
| #39cbd0 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 1.98:1 | fail | fail | fail | |
Aaon black | 10.63:1 | 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 #39cbd0 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
Fonts for this mood
#39cbd0 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #39cbd0
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 #39cbd0 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/39cbd0-a2babe-d45990-1f272d-e9f1ee?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