Circuit
Open in tool →Violet plus cyan is the current AI-product signal — pair it with pure black type to keep it from going candy.
Color
#31bbd3
#31bbd3
hex
#31bbd3rgb
rgb(49, 187, 211)hsl
hsl(189, 65%, 51%)oklch
oklch(0.731 0.117 212.3)Closest name: Blue Bobbin (#52b4ca)Relative luminance 0.409
Colors that go with #31bbd3
Charcoal, Dark Orange and Denim 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 #31bbd3: softer than #000 and cool enough to feel like part of the same palette.
Dark Orange #ff8c00
split-complementshippedDark Orange is a split-complement of #31bbd3: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Denim #1560bd
shippedDenim is paired with #31bbd3 in 5 real palettes, including Coca-Cola's brand system and UEFA's brand system, as the accent — a combination designers have actually shipped, not a computed rotation.
Dodger Blue #1e90ff
shippedDodger Blue is paired with #31bbd3 in 4 real palettes, including Patreon's brand system and Figma's brand system, as the accent — a combination designers have actually shipped, not a computed rotation.
Midnight Blue #191970
shippedMidnight Blue is paired with #31bbd3 in 7 real palettes, including Confluent's brand system and Ford's brand system, as the lead colour — a combination designers have actually shipped, not a computed rotation.
Royal Blue #4169e1
shippedRoyal Blue is paired with #31bbd3 in 8 real palettes, including Confluent's brand system and Elastic's brand system, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Taupe #483c32
shippedTaupe is paired with #31bbd3 in 10 real palettes, including Cursor's brand system and Crayon Box, as the text colour against it — a combination designers have actually shipped, not a computed rotation.
Salmon #fa8072
complementarySalmon sits directly opposite #31bbd3 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Real palettes that use #31bbd3
Tints & shades
Harmonies
Contrast
| #31bbd3 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 2.29:1 | fail | fail | fail | |
Aaon black | 9.18:1 | 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 #31bbd3 as the background.
Brands using this color
Palettes built around it
Fonts for this mood
#31bbd3 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #31bbd3
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 #31bbd3 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/31bbd3-a2b7be-df4e7e-1f252d-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