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
#3bbbf7
#3bbbf7
hex
#3bbbf7rgb
rgb(59, 187, 247)hsl
hsl(199, 92%, 60%)oklch
oklch(0.749 0.138 233.8)Closest name: deepskyblue (#00bfff)Relative luminance 0.4319
Colors that go with #3bbbf7
Charcoal, Dark Orange and Midnight Blue 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.
Dark Orange #ff8c00
complementaryshippedDark Orange sits directly opposite #3bbbf7 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Midnight Blue #191970
shippedMidnight Blue is paired with #3bbbf7 in 4 real palettes, including Blue Mono and Telehealth, as the text colour against it — a combination designers have actually shipped, not a computed rotation.
Goldenrod #daa520
split-complementshippedGoldenrod is a split-complement of #3bbbf7: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Hot Pink #ff69b4
triadicshippedHot Pink completes a triad with #3bbbf7 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Salmon #fa8072
split-complementSalmon is a split-complement of #3bbbf7: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Cadet Blue #5f9ea0
shippedCadet Blue is paired with #3bbbf7 in two real palettes: Arctic and Coastal, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Dark Slate Blue #483d8b
shippedDark Slate Blue is paired with #3bbbf7 in two real palettes: Harbour and First Snow, as the lead colour — a combination designers have actually shipped, not a computed rotation.
Real palettes that use #3bbbf7
Tints & shades
Harmonies
Contrast
| #3bbbf7 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 2.18:1 | fail | fail | fail | |
Aaon black | 9.64:1 | 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 #3bbbf7 as the background.
Brands using this color
No public brand in the corpus uses this exact color yet. Extract a brand to add one.
Palettes built around it
Fonts for this mood
#3bbbf7 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #3bbbf7
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 #3bbbf7 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/3bbbf7-9cb3c4-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