Harbour
Open in tool →Steel blue and haze with a buoy orange on a pale grey — the maritime palette every port town uses for a reason.
Color
#a3c1db
#a3c1db
hex
#a3c1dbrgb
rgb(163, 193, 219)hsl
hsl(208, 44%, 75%)oklch
oklch(0.797 0.049 244.6)Closest name: Airborne (#a2c2d0)Relative luminance 0.5104
Colors that go with #a3c1db
Charcoal, Sand and 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.
Charcoal #36454f
neutralshippedCharcoal is the text near-black for #a3c1db: softer than #000 and cool enough to feel like part of the same palette.
Sand #c2b280
complementaryshippedSand sits directly opposite #a3c1db on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Blue #0000ff
shipped4 real palettes, including Uber's brand system and Warp's brand system put Blue beside #a3c1db, as the accent.
Crimson #dc143c
shippedCrimson is paired with #a3c1db in 5 real palettes, including Frost & Ember and Tiffany & Co.'s brand system, as the accent.
Deep Sky Blue #00bfff
shippedDesigners have shipped Deep Sky Blue with #a3c1db: 7 real palettes, including Max's brand system and Calm's brand system, as the supporting colour.
Denim #1560bd
shippedDesigners have shipped Denim with #a3c1db: 7 real palettes, including Open House and Nikon's brand system, as the lead colour.
Dodger Blue #1e90ff
shippedDesigners have shipped Dodger Blue with #a3c1db: 4 real palettes, including Opensea's brand system and Patreon's brand system, as the lead colour.
Midnight Blue #191970
shipped7 real palettes, including Lavender Milk and Telehealth put Midnight Blue beside #a3c1db, as the text colour against it.
Real palettes that use #a3c1db
Tints & shades
Harmonies
Contrast
| #a3c1db as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 1.87:1 | fail | fail | fail | |
Aaon black | 11.21:1 | 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 #a3c1db as the background.
Brands using this color
Palettes built around it
Fonts for this mood
#a3c1db reads as cool, light, clean. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #a3c1db
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 #a3c1db and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/a3c1db-9cadc4-df4e51-1f212d-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