Color

#374153

#374153
hex#374153
rgbrgb(55, 65, 83)
hslhsl(219, 20%, 27%)
oklchoklch(0.374 0.034 262.1)
Closest name: Arsenic (#3b444b)Relative luminance 0.0522

Tints & shades

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

Harmonies

Complementary

Open in tool →

#534937

#374e53 · #3b3753

#533741 · #415337

Split-complementary

Open in tool →

#533b37 · #4e5337

#53374e · #534937 · #37533b

Contrast

#374153 as textRatioAAAA largeAAAFix
Aaon white
10.28:1passpasspassPasses AAA — no fix needed.
Aaon black
2.04:1failfailfail
  • AA: use #647596 as the text (4.53:1)
  • AAA: use #8896af as the text (7.03:1)
  • AA: or shift the background to #adadad (4.58:1)
  • AAA: or shift the background to #d6d6d6 (7.07:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #374153 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

#374153 reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #374153
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 #374153 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/374153-9ca5c4-df664e-211f2d-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