Color

#37b7cd

#37b7cd
hex#37b7cd
rgbrgb(55, 183, 205)
hslhsl(189, 60%, 51%)
oklchoklch(0.721 0.112 211.7)
Closest name: Blue Bobbin (#52b4ca)Relative luminance 0.3909

Tints & shades

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

Harmonies

Complementary

Open in tool →

#cd4e37

#37cd99 · #376ccd

#cd37b7 · #b7cd37

Split-complementary

Open in tool →

#cd376c · #cd9937

#9937cd · #cd4e37 · #6ccd37

Contrast

#37b7cd as textRatioAAAA largeAAAFix
Aaon white
2.38:1failfailfail
  • AA: use #247f8f as the text (4.66:1)
  • AAA: use #1b5e6a as the text (7.35:1)
  • AA: or shift the background to #3d3d3d (4.56:1)
  • AAA: or shift the background to #1c1c1c (7.16:1)
Aaon black
8.82:1passpasspassPasses AAA — no fix needed.

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #37b7cd as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#37b7cd reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #37b7cd
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 #37b7cd and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/37b7cd-a2b7be-df4e7e-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