Color

#374243

#374243
hex#374243
rgbrgb(55, 66, 67)
hslhsl(185, 10%, 24%)
oklchoklch(0.37 0.014 203.3)
Closest name: Arsenic (#3b444b)Relative luminance 0.0511

Tints & shades

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

Harmonies

Complementary

Open in tool →

#433837

#37433e · #373c43

#433742 · #424337

Split-complementary

Open in tool →

#43373c · #433e37

#3e3743 · #433837 · #3c4337

Contrast

#374243 as textRatioAAAA largeAAAFix
Aaon white
10.38:1passpasspassPasses AAA — no fix needed.
Aaon black
2.02:1failfailfail
  • AA: use #657a7b as the text (4.62:1)
  • AAA: use #869a9c as the text (7.12:1)
  • AA: or shift the background to #ababab (4.52:1)
  • AAA: or shift the background to #d4d4d4 (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 #374243 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

#374243 reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #374243
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 #374243 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/374243-a2b8be-df4e88-1f262d-e9f1ee?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