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
#213440
#213440
hex
#213440rgb
rgb(33, 52, 64)hsl
hsl(203, 32%, 19%)oklch
oklch(0.314 0.033 236.9)Closest name: Blue Whale (#1e3442)Relative luminance 0.0315
Colors that go with #213440
Dark Olive Green, Sienna and Steel 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.
Dark Olive Green #556b2f
split-complementshippedDark Olive Green is a split-complement of #213440: nearly opposite, so it still pops against it, without the vibrating edge of a true complement.
Sienna #a0522d
complementaryshippedSienna sits directly opposite #213440 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight.
Steel Blue #4682b4
analogousshippedSteel Blue is #213440's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces.
Teal #008080
analogousshippedTeal is #213440'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 #213440 in 9 real palettes, including Beach Hut and McDonald's's brand system, as the supporting colour.
Blue #0000ff
shipped15 real palettes, including Minecraft's brand system and Headspace's brand system put Blue beside #213440, as the accent.
Blush Pink #e8b4b8
shipped5 real palettes, including Rain Garden and Garden Wedding put Blush Pink beside #213440, as the accent.
White Smoke #f5f5f5
neutralWhite Smoke is the surface for #213440: a clean near-white with no warm cast, so the cool hue stays clear instead of drifting muddy.
Real palettes that use #213440
Tints & shades
Harmonies
Contrast
| #213440 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 12.88:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.63:1 | 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 #213440 as the background.
Brands using this color
- Asanaprimary · #273240 · Δ1.017
- Vimeosecondary · #23313b · Δ1.143
- Bloombergsecondary · #2b333f · Δ1.423
- Hermèsaccent · #2b333f · Δ1.423
- PlayStation® Official Site: Consoles, Games, Accessories & MoreSony Interactive Entertainmentsecondary · #2b333f · Δ1.423
- Boeingprimary · #253746 · Δ1.482
- UEFAsecondary · #1a313c · Δ1.554
- Dockerprimary · #2c333f · Δ1.577
- Audiprimary · #2c343f · Δ1.587
- Amazonsecondary · #232f3e · Δ1.635
- Volkswagensecondary · #293043 · Δ1.913
Palettes built around it
Fonts for this mood
#213440 reads as cool, muted, dark. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #213440
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 #213440 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/213440-9cb0c4-df4e5d-1f222d-e9f1f0?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