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
#313644
#313644
hex
#313644rgb
rgb(49, 54, 68)hsl
hsl(224, 16%, 23%)oklch
oklch(0.334 0.026 269.6)Closest name: After Midnight (#38393f)Relative luminance 0.0371
Colors that go with #313644
Amber, Blue and Blush Pink 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.
Amber #ffbf00
shippedAmber is paired with #313644 in 4 real palettes, including Beach Hut and Wikipedia's brand system, as the supporting colour.
Blue #0000ff
shipped12 real palettes, including Dunkin''s brand system and Headspace's brand system put Blue beside #313644, as the supporting colour.
Blush Pink #e8b4b8
shipped5 real palettes, including Garden Wedding and Rain Garden put Blush Pink beside #313644, as the supporting colour.
Burlywood #deb887
shippedBurlywood is paired with #313644 in 5 real palettes, including Polaroid and Coastal, as the accent.
Cadet Blue #5f9ea0
shippedDesigners have shipped Cadet Blue with #313644: 8 real palettes, including Clean Beauty and Coastal, as the lead colour.
Champagne #f7e7ce
shipped7 real palettes, including Sweetgreen's brand system and Darkroom put Champagne beside #313644, as the supporting colour.
Chocolate #d2691e
shippedChocolate shows up next to #313644 in 4 real palettes, including Homestead and Wellness, as the accent.
White Smoke #f5f5f5
neutralWhite Smoke is the near-white surface #313644 was made for — maximum legibility with no colour cast to argue with.
Real palettes that use #313644
Tints & shades
Harmonies
Contrast
| #313644 as text | Ratio | AA | AA large | AAA | Fix |
|---|---|---|---|---|---|
Aaon white | 12.06:1 | pass | pass | pass | Passes AAA — no fix needed. |
Aaon black | 1.74:1 | 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 #313644 as the background.
Brands using this color
- Mercuryprimary · #323341 · Δ0.968
- Blizzardsecondary · #323a48 · Δ1.345
- Audiprimary · #2c343f · Δ1.346
- Dockerprimary · #2c333f · Δ1.506
- Bloombergsecondary · #2b333f · Δ1.615
- PlayStation® Official Site: Consoles, Games, Accessories & MoreSony Interactive Entertainmentsecondary · #2b333f · Δ1.615
- Boeingprimary · #253746 · Δ1.753
Palettes built around it
Fonts for this mood
#313644 reads as cool, muted, dark. The font library is tagged with the same vocabulary:
mcpConnect your agent — build around #313644
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 #313644 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link
tool url
/palettes/new/313644-9ca2c4-df724e-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