Color

#37597b

#37597b
hex#37597b
rgbrgb(55, 89, 123)
hslhsl(210, 38%, 35%)
oklchoklch(0.453 0.069 249.6)
Closest name: Deep Indigo (#4c567a)Relative luminance 0.0939

Tints & shades

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

Harmonies

Complementary

Open in tool →

#7b5937

#377b7b · #37377b

#7b3759 · #597b37

Split-complementary

Open in tool →

#7b3737 · #7b7b37

#7b377b · #7b5937 · #377b37

Contrast

#37597b as textRatioAAAA largeAAAFix
Aaon white
7.3:1passpasspassPasses AAA — no fix needed.
Aaon black
2.88:1failfailfail
  • AA: use #4a78a5 as the text (4.52:1)
  • AAA: use #7299c0 as the text (7.03:1)
  • AA: or shift the background to #cccccc (4.54:1)
  • AAA: or shift the background to #fcfcfc (7.11:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #37597b 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

#37597b reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #37597b
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 #37597b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/37597b-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