Color

#374b4e

#374b4e
hex#374b4e
rgbrgb(55, 75, 78)
hslhsl(188, 17%, 26%)
oklchoklch(0.397 0.025 207.6)
Closest name: darkslategray (#2f4f4f)Relative luminance 0.0639

Tints & shades

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

Harmonies

Complementary

Open in tool →

#4e3a37

#374e45 · #373f4e

#4e374b · #4b4e37

Split-complementary

Open in tool →

#4e373f · #4e4537

#45374e · #4e3a37 · #3f4e37

Contrast

#374b4e as textRatioAAAA largeAAAFix
Aaon white
9.22:1passpasspassPasses AAA — no fix needed.
Aaon black
2.28:1failfailfail
  • AA: use #5b7b80 as the text (4.59:1)
  • AAA: use #799ba0 as the text (7.01:1)
  • AA: or shift the background to #b8b8b8 (4.65:1)
  • AAA: or shift the background to #e3e3e3 (7.18:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #374b4e 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

#374b4e reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #374b4e
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 #374b4e and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/374b4e-a2b7be-df4e81-1f252d-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