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
#28a9cc
#28a9cc
hex
#28a9ccrgb
rgb(40, 169, 204)hsl
hsl(193, 67%, 48%)oklch
oklch(0.683 0.116 221.3)Closest name: Aquarius (#2db0ce)Relative luminance 0.3319
Colors that go with #28a9cc
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 #28a9cc: softer than #000 and cool enough to feel like part of the same palette.
Tomato #ff6347
complementaryshippedTomato sits directly opposite #28a9cc 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 #28a9cc in 5 real palettes, including Salesforce's brand system and Blueprint, as the accent.
Blue #0000ff
shipped4 real palettes, including Canva's brand system and Warp's brand system put Blue beside #28a9cc, as the accent.
Denim #1560bd
shippedDesigners have shipped Denim with #28a9cc: 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 #28a9cc: 4 real palettes, including Figma's brand system and Venmo's brand system, as the accent.
Medium Sea Green #3cb371
shippedMedium Sea Green is paired with #28a9cc in 4 real palettes, including Terminal and Unity's brand system, as the lead colour.
Midnight Blue #191970
shipped9 real palettes, including Confluent's brand system and SoFi's brand system put Midnight Blue beside #28a9cc, as the lead colour.
Real palettes that use #28a9cc
Tints & shades
Harmonies
Contrast
| #28a9cc as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 2.75:1 | fail | fail | fail | |
Aaon black | 7.64:1 | 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 #28a9cc as the background.
Brands using this color
Palettes built around it
Fonts for this mood
#28a9cc reads as cool, vivid, technical. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #28a9cc
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 #28a9cc and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/28a9cc-a2b5be-df4e75-1f242d-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