Deep Water
Open in tool →Cyan and mid-blue on abyss navy with a foam highlight — the ocean at depth; the darker the surface, the brighter the water.
Color
#31b2dd
#31b2dd
hex
#31b2ddrgb
rgb(49, 178, 221)hsl
hsl(195, 72%, 53%)oklch
oklch(0.714 0.123 225.6)Closest name: Aquarius (#2db0ce)Relative luminance 0.3771
Colors that go with #31b2dd
Charcoal, Amber and Dark Orange 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 #31b2dd: softer than #000 and cool enough to feel like part of the same palette.
Amber #ffbf00
shippedAmber is paired with #31b2dd in 5 real palettes, including Salesforce's brand system and Blueprint, as the accent.
Dark Orange #ff8c00
shippedDark Orange shows up next to #31b2dd in 4 real palettes, including Elastic's brand system and Learning App, as the lead colour.
Denim #1560bd
shippedDesigners have shipped Denim with #31b2dd: 7 real palettes, including Coca-Cola's brand system and Venmo's brand system, as the accent.
Dodger Blue #1e90ff
shippedDesigners have shipped Dodger Blue with #31b2dd: 4 real palettes, including Figma's brand system and Venmo's brand system, as the accent.
Midnight Blue #191970
shipped8 real palettes, including Confluent's brand system and SoFi's brand system put Midnight Blue beside #31b2dd, as the lead colour.
Orange Red #ff4500
shippedOrange Red is paired with #31b2dd in 4 real palettes, including Cursor's brand system and Figma's brand system, as the lead colour.
Coral #ff7f50
complementaryCoral sits directly opposite #31b2dd 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 #31b2dd
Tints & shades
Harmonies
Contrast
| #31b2dd as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 2.46:1 | fail | fail | fail | |
Aaon black | 8.54:1 | 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 #31b2dd as the background.
Brands using this color
Palettes built around it
Fonts for this mood
#31b2dd reads as cool, vivid, technical. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #31b2dd
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 #31b2dd and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/31b2dd-9cb5c4-df4e70-1f242d-e9f1ef?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