Blue Mono
Open in tool →One blue at four lightnesses — monochromatic in the colour-theory sense; the deep step is the text, the pale step the surface tint.
Color
Calendly Primary
#64acfb
hex
#64acfbrgb
rgb(100, 172, 251)hsl
hsl(211, 95%, 69%)oklch
oklch(0.731 0.136 252.1)From Calendly brand colorsRelative luminance 0.3918
Colors that go with Calendly Primary
Charcoal, Goldenrod 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.
Goldenrod #daa520
complementaryshippedGoldenrod sits directly opposite Calendly Primary 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 Calendly Primary in 5 real palettes, including Blue Mono and First Snow, as the text colour against it — a combination designers have actually shipped, not a computed rotation.
Periwinkle #ccccff
shippedPeriwinkle is paired with Calendly Primary in 3 real palettes, including Calendly's brand system and Blue Mono, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Coral #ff7f50
split-complementCoral is a split-complement of Calendly Primary: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Amber #ffbf00
shippedAmber is paired with Calendly Primary in two real palettes: Blueprint and Heatwave, as the accent — a combination designers have actually shipped, not a computed rotation.
Cadet Blue #5f9ea0
shippedCadet Blue is paired with Calendly Primary in two real palettes: Arctic and Coastal, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
Dark Orange #ff8c00
shippedDark Orange is paired with Calendly Primary in two real palettes: Learning App and PayPal's brand system, as the accent — a combination designers have actually shipped, not a computed rotation.
Real palettes that use Calendly Primary
Tints & shades
Harmonies
Contrast
| Calendly Primary as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 2.38:1 | fail | fail | fail | |
Aaon black | 8.84:1 | 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 Calendly Primary as the background.
Brands using this color
Palettes built around it
Fonts for this mood
Calendly Primary reads as cool, vivid, technical. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around Calendly Primary
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 #64acfb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/64acfb-9cabc4-df534e-1f202d-e9f1f1?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