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
#34577f
#34577f
hex
#34577frgb
rgb(52, 87, 127)hsl
hsl(212, 42%, 35%)oklch
oklch(0.449 0.078 252.8)Closest name: Assassin (#2d4f83)Relative luminance 0.0908
Colors that go with #34577f
Sienna, Blue and Cadet 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.
Sienna #a0522d
complementaryshippedSienna sits directly opposite #34577f on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Blue #0000ff
shipped7 real palettes, including Tesco's brand system and CVS's brand system put Blue beside #34577f, as the supporting colour.
Cadet Blue #5f9ea0
shippedDesigners have shipped Cadet Blue with #34577f: 4 real palettes, including Dusk and Open House, as the supporting colour.
Cornflower Blue #6495ed
shippedDesigners have shipped Cornflower Blue with #34577f: 4 real palettes, including Coca-Cola's brand system and Gopro's brand system, as the supporting colour.
Crimson #dc143c
shippedCrimson is paired with #34577f in 14 real palettes, including Codecademy's brand system and Walgreens's brand system, as the accent.
Firebrick #b22222
shippedDesigners have shipped Firebrick with #34577f: 4 real palettes, including Fireside and Wendy's's brand system, as the lead colour.
Goldenrod #daa520
shippedGoldenrod shows up next to #34577f in 5 real palettes, including Open House and Mid-Century, as the accent.
White Smoke #f5f5f5
neutralWhite Smoke is the surface for #34577f: a clean near-white with no warm cast, so the cool hue stays clear instead of drifting muddy.
Real palettes that use #34577f
Tints & shades
Harmonies
Contrast
| #34577f as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 7.46:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 2.82:1 | fail | fail | fail |
Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #34577f 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
#34577f reads as cool, modern. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #34577f
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 #34577f and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/34577f-9caac4-df564e-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