Blueprint
Open in tool →Cyan and indigo on navy is the developer-tool look; amber is the only warm note, so it always reads as 'attention'.
Color
#39bcf9
#39bcf9
hex
#39bcf9rgb
rgb(57, 188, 249)hsl
hsl(199, 94%, 60%)oklch
oklch(0.752 0.14 233.8)Closest name: deepskyblue (#00bfff)Relative luminance 0.4368
Colors that go with #39bcf9
Charcoal, Dark Orange 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 #39bcf9: softer than #000 and cool enough to feel like part of the same palette.
Dark Orange #ff8c00
complementaryshippedDark Orange sits directly opposite #39bcf9 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 #39bcf9 in 4 real palettes, including Blueprint and Salesforce's brand system, as the accent.
Denim #1560bd
shippedDesigners have shipped Denim with #39bcf9: 5 real palettes, including Coca-Cola's brand system and UEFA's brand system, as the accent.
Midnight Blue #191970
shipped7 real palettes, including Kraken's brand system and Blue Mono put Midnight Blue beside #39bcf9, as the lead colour.
Powder Blue #b0e0e6
shippedDesigners have shipped Powder Blue with #39bcf9: 4 real palettes, including Calendly's brand system and First Snow, as the accent.
Royal Blue #4169e1
shippedRoyal Blue is paired with #39bcf9 in 7 real palettes, including NBA's brand system and Elastic's brand system, as the supporting colour.
Taupe #483c32
shippedTaupe is paired with #39bcf9 in 5 real palettes, including Astro's brand system and Cursor's brand system, as the text colour against it.
Real palettes that use #39bcf9
Tints & shades
Harmonies
Contrast
| #39bcf9 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 2.16:1 | fail | fail | fail | |
Aaon black | 9.74:1 | 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 #39bcf9 as the background.
Brands using this color
Palettes built around it
Fonts for this mood
#39bcf9 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #39bcf9
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 #39bcf9 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/39bcf9-9cb3c4-df4e66-1f232d-e9f1f0?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