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
#c9dbf3
#c9dbf3
hex
#c9dbf3rgb
rgb(201, 219, 243)hsl
hsl(214, 64%, 87%)oklch
oklch(0.885 0.038 255.6)Closest name: Fly a Kite (#c8daf5)Relative luminance 0.6955
Colors that go with #c9dbf3
Charcoal, Deep Sky Blue and Emerald Green 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 #c9dbf3: softer than #000 and cool enough to feel like part of the same palette.
Deep Sky Blue #00bfff
analogousshippedDeep Sky Blue is #c9dbf3's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Emerald Green #50c878
triadicshippedEmerald Green completes a triad with #c9dbf3 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash.
Goldenrod #daa520
complementaryshippedGoldenrod sits directly opposite #c9dbf3 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Lilac #c8a2c8
analogousshippedLilac is #c9dbf3's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Amber #ffbf00
shippedAmber is paired with #c9dbf3 in 8 real palettes, including Blueprint and Salesforce's brand system, as the accent.
Blue #0000ff
shipped5 real palettes, including Uber's brand system and Binance's brand system put Blue beside #c9dbf3, as the accent.
Brown #a52a2a
shipped4 real palettes, including Velvet and Woodsmoke put Brown beside #c9dbf3, as the lead colour.
Real palettes that use #c9dbf3
Tints & shades
Harmonies
Contrast
| #c9dbf3 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 1.41:1 | fail | fail | fail | |
Aaon black | 14.91:1 | 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 #c9dbf3 as the background.
Brands using this color
Palettes built around it
Fonts for this mood
#c9dbf3 reads as cool, vivid, light. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #c9dbf3
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 #c9dbf3 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/c9dbf3-9ca9c4-df5a4e-1f1f2d-e9f0f1?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