Color

#374a67

#374a67
hex#374a67
rgbrgb(55, 74, 103)
hslhsl(216, 30%, 31%)
oklchoklch(0.406 0.055 258.6)
Closest name: Bonne Nuit (#3a4866)Relative luminance 0.0669

Tints & shades

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

Harmonies

Complementary

Open in tool →

#675437

#376267 · #3c3767

#67374a · #4a6737

Split-complementary

Open in tool →

#673c37 · #626737

#673762 · #675437 · #37673c

Contrast

#374a67 as textRatioAAAA largeAAAFix
Aaon white
8.98:1passpasspassPasses AAA — no fix needed.
Aaon black
2.34:1failfailfail
  • AA: use #5978a6 as the text (4.66:1)
  • AAA: use #8198bb as the text (7.14:1)
  • AA: or shift the background to #b8b8b8 (4.53:1)
  • AAA: or shift the background to #e6e6e6 (7.2:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #374a67 as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

mcpConnect your agent — build around #374a67
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — generate_palette, check_contrast, analyze_color — read-only, no key. Every palette it proposes comes with a /palettes/new/… link: open it, lock what you like, paste the link back.

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

analyze #374a67 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/374a67-9ca7c4-df5f4e-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