Color

#343a50

#343a50
hex#343a50
rgbrgb(52, 58, 80)
hslhsl(227, 21%, 26%)
oklchoklch(0.353 0.039 272.5)
Closest name: Call It a Night (#42364c)Relative luminance 0.0434

Colors that go with #343a50

Dark Olive Green, Sea Green 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.

Tints & shades

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

Harmonies

Complementary

Open in tool →

#504a34

#344850 · #3c3450

#50343a · #3a5034

Split-complementary

Open in tool →

#503c34 · #485034

#503448 · #504a34 · #34503c

Contrast

#343a50 as textRatioAAAA largeAAAFix
Aaon white
11.25:1passpasspassPasses AAA — no fix needed.
Aaon black
1.87:1failfailfail
  • AA: use #68739c as the text (4.52:1)
  • AAA: use #8d95b4 as the text (7.09:1)
  • AA: or shift the background to #a6a6a6 (4.62:1)
  • AAA: or shift the background to #cccccc (7:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #343a50 as the background.

Brands using this color

Fonts for this mood

#343a50 reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #343a50
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 #343a50 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/343a50-9ca0c4-df7a4e-221f2d-e9eff1?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