Color

#374358

#374358
hex#374358
rgbrgb(55, 67, 88)
hslhsl(218, 23%, 28%)
oklchoklch(0.381 0.039 261.5)
Closest name: Arsenic (#3b444b)Relative luminance 0.0553

Tints & shades

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

Harmonies

Complementary

Open in tool →

#584c37

#375358 · #3b3758

#583743 · #435837

Split-complementary

Open in tool →

#583b37 · #535837

#583753 · #584c37 · #37583b

Contrast

#374358 as textRatioAAAA largeAAAFix
Aaon white
9.97:1passpasspassPasses AAA — no fix needed.
Aaon black
2.11:1failfailfail
  • AA: use #60759a as the text (4.51:1)
  • AAA: use #8898b4 as the text (7.2:1)
  • AA: or shift the background to #b0b0b0 (4.6:1)
  • AAA: or shift the background to #d9d9d9 (7.06:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #374358 as the background.

Brands using this color

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

Fonts for this mood

#374358 reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #374358
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 #374358 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/374358-9ca6c4-df644e-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