Lido
Open in tool →Pool blue, watermelon and sun on white — the poolside summer set; the deep teal text keeps it from going juvenile.
Color
#03a9bf
#03a9bf
hex
#03a9bfrgb
rgb(3, 169, 191)hsl
hsl(187, 97%, 38%)oklch
oklch(0.674 0.117 211)Closest name: Aquarius (#2db0ce)Relative luminance 0.3216
Colors that go with #03a9bf
Charcoal, Tomato and Amber 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 #03a9bf: softer than #000 and cool enough to feel like part of the same palette.
Tomato #ff6347
complementaryshippedTomato sits directly opposite #03a9bf on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Amber #ffbf00
shippedAmber is paired with #03a9bf in 4 real palettes, including Salesforce's brand system and Blueprint, as the accent.
Denim #1560bd
shippedDesigners have shipped Denim with #03a9bf: 7 real palettes, including Gopro's brand system and Coca-Cola's brand system, as the lead colour.
Dodger Blue #1e90ff
shippedDesigners have shipped Dodger Blue with #03a9bf: 4 real palettes, including Figma's brand system and Venmo's brand system, as the accent.
Midnight Blue #191970
shipped9 real palettes, including Ford's brand system and Confluent's brand system put Midnight Blue beside #03a9bf, as the lead colour.
Royal Blue #4169e1
shippedRoyal Blue is paired with #03a9bf in 6 real palettes, including Confluent's brand system and Elastic's brand system, as the supporting colour.
Sky Blue #87ceeb
shippedSky Blue is paired with #03a9bf in 4 real palettes, including Coastal and Dusty Blue, as the supporting colour.
Real palettes that use #03a9bf
Tints & shades
Harmonies
Contrast
| #03a9bf as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 2.83:1 | fail | fail | fail | |
Aaon black | 7.43:1 | 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 #03a9bf as the background.
Brands using this color
Palettes built around it
Fonts for this mood
#03a9bf reads as cool, vivid, technical. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #03a9bf
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 #03a9bf and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/03a9bf-a2b8be-df4e83-1f262d-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