Color

#373f4e

#373f4e
hex#373f4e
rgbrgb(55, 63, 78)
hslhsl(219, 17%, 26%)
oklchoklch(0.367 0.028 262.9)
Closest name: Arsenic (#3b444b)Relative luminance 0.0492

Tints & shades

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

Harmonies

Complementary

Open in tool →

#4e4637

#374a4e · #3a374e

#4e373f · #3f4e37

Split-complementary

Open in tool →

#4e3a37 · #4a4e37

#4e374a · #4e4637 · #374e3a

Contrast

#373f4e as textRatioAAAA largeAAAFix
Aaon white
10.59:1passpasspassPasses AAA — no fix needed.
Aaon black
1.98:1failfailfail
  • AA: use #687792 as the text (4.64:1)
  • AAA: use #8b96ac as the text (7.06:1)
  • AA: or shift the background to #ababab (4.61:1)
  • AAA: or shift the background to #d4d4d4 (7.14:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #373f4e 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

#373f4e reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #373f4e
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 #373f4e and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/373f4e-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