Color

#334661

#334661
hex#334661
rgbrgb(51, 70, 97)
hslhsl(215, 31%, 29%)
oklchoklch(0.39 0.052 257.2)
Closest name: Bonne Nuit (#3a4866)Relative luminance 0.0595

Colors that go with #334661

Sea Green, Teal 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.

Tints & shades

Every swatch is its own page — click any to analyze it.

Harmonies

Complementary

Open in tool →

#614e33

#335d61 · #373361

#613346 · #466133

Split-complementary

Open in tool →

#613733 · #5d6133

#61335d · #614e33 · #336137

Contrast

#334661 as textRatioAAAA largeAAAFix
Aaon white
9.59:1passpasspassPasses AAA — no fix needed.
Aaon black
2.19:1failfailfail
  • AA: use #5676a4 as the text (4.52:1)
  • AAA: use #8099bc as the text (7.2:1)
  • AA: or shift the background to #b3b3b3 (4.57:1)
  • AAA: or shift the background to #dedede (7.13:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #334661 as the background.

Brands using this color

Fonts for this mood

#334661 reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #334661
live endpoint

Point 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.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #334661 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/334661-9ca8c4-df5d4e-201f2d-e9f0f1?lock=0&style=vibrant

Want the agent to remember your picks and write them into a living brand? Create a free BrandSweets workspace.

Machine-readable: color.md