Color

#373d43

#373d43
hex#373d43
rgbrgb(55, 61, 67)
hslhsl(210, 10%, 24%)
oklchoklch(0.357 0.013 248.2)
Closest name: After Midnight (#38393f)Relative luminance 0.0455

Tints & shades

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

Harmonies

Complementary

Open in tool →

#433d37

#374343 · #373743

#43373d · #3d4337

Split-complementary

Open in tool →

#433737 · #434337

#433743 · #433d37 · #374337

Contrast

#373d43 as textRatioAAAA largeAAAFix
Aaon white
10.99:1passpasspassPasses AAA — no fix needed.
Aaon black
1.91:1failfailfail
  • AA: use #6c7884 as the text (4.66:1)
  • AAA: use #8f99a3 as the text (7.25:1)
  • AA: or shift the background to #a6a6a6 (4.51:1)
  • AAA: or shift the background to #cfcfcf (7.05:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #373d43 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

#373d43 reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #373d43
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 #373d43 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/373d43-9cabc4-df514e-1f202d-e9f1f1?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