Color

#374658

#374658
hex#374658
rgbrgb(55, 70, 88)
hslhsl(213, 23%, 28%)
oklchoklch(0.389 0.036 253.3)
Closest name: Arsenic (#3b444b)Relative luminance 0.059

Tints & shades

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

Harmonies

Complementary

Open in tool →

#584937

#375658 · #393758

#583746 · #465837

Split-complementary

Open in tool →

#583937 · #565837

#583756 · #584937 · #375839

Contrast

#374658 as textRatioAAAA largeAAAFix
Aaon white
9.64:1passpasspassPasses AAA — no fix needed.
Aaon black
2.18:1failfailfail
  • AA: use #5e7897 as the text (4.61:1)
  • AAA: use #8297b0 as the text (7:1)
  • AA: or shift the background to #b3b3b3 (4.6:1)
  • AAA: or shift the background to #dedede (7.16:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #374658 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

#374658 reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #374658
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 #374658 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/374658-9ca9c4-df584e-1f202d-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