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
#4b577c
#4b577c
hex
#4b577crgb
rgb(75, 87, 124)hsl
hsl(225, 25%, 39%)oklch
oklch(0.462 0.062 270.1)Closest name: Deep Indigo (#4c567a)Relative luminance 0.0977
Colors that go with #4b577c
Crimson, Goldenrod and Medium Sea 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.
Crimson #dc143c
shippedCrimson is paired with #4b577c in 4 real palettes, including Netflix's brand system and Retro Pop, as the lead colour — a combination designers have actually shipped, not a computed rotation.
Goldenrod #daa520
shippedGoldenrod is paired with #4b577c in 4 real palettes, including Open House and Mid-Century, as the accent — a combination designers have actually shipped, not a computed rotation.
Medium Sea Green #3cb371
shippedMedium Sea Green is paired with #4b577c in 5 real palettes, including Console Light and Fintech Trust, as the accent — a combination designers have actually shipped, not a computed rotation.
Powder Blue #b0e0e6
shippedPowder Blue is paired with #4b577c in 4 real palettes, including First Snow and Stone, as the accent — a combination designers have actually shipped, not a computed rotation.
Royal Blue #4169e1
shippedRoyal Blue is paired with #4b577c in 4 real palettes, including Stripe's brand system and Console Light, as the accent — a combination designers have actually shipped, not a computed rotation.
Sage Green #9caf88
shippedSage Green is paired with #4b577c in 4 real palettes, including Darkroom and Oatmeal, as the supporting colour — a combination designers have actually shipped, not a computed rotation.
White Smoke #f5f5f5
neutralWhite Smoke is the surface for #4b577c: a clean near-white with no warm cast, so the cool hue stays clear instead of drifting muddy.
Dark Olive Green #556b2f
complementaryDark Olive Green sits directly opposite #4b577c on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Real palettes that use #4b577c
Tints & shades
Harmonies
Contrast
| #4b577c as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 7.11:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 2.95:1 | 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 #4b577c 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
mcpConnect your agent — build around #4b577c
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 #4b577c and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/4b577c-9ca1c4-df754e-221f2d-e9eff1?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