Color

#37555c

#37555c
hex#37555c
rgbrgb(55, 85, 92)
hslhsl(191, 25%, 29%)
oklchoklch(0.429 0.037 214)
Closest name: All Nighter (#455454)Relative luminance 0.0808

Tints & shades

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

Harmonies

Complementary

Open in tool →

#5c3e37

#375c51 · #37435c

#5c3756 · #565c37

Split-complementary

Open in tool →

#5c3743 · #5c5137

#51375c · #5c3e37 · #435c37

Contrast

#37555c as textRatioAAAA largeAAAFix
Aaon white
8.03:1passpasspassPasses AAA — no fix needed.
Aaon black
2.62:1failfailfail
  • AA: use #507c86 as the text (4.57:1)
  • AAA: use #709ea9 as the text (7.15:1)
  • AA: or shift the background to #c2c2c2 (4.51:1)
  • AAA: or shift the background to #f0f0f0 (7.04:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #37555c 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

#37555c reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #37555c
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 #37555c and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/37555c-a2b6be-df4e7a-1f252d-e9f1ef?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