Color

#37b2cd

#37b2cd
hex#37b2cd
rgbrgb(55, 178, 205)
hslhsl(191, 60%, 51%)
oklchoklch(0.709 0.111 215.9)
Closest name: Aquarius (#2db0ce)Relative luminance 0.3706

Tints & shades

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

Harmonies

Complementary

Open in tool →

#cd5337

#37cd9e · #3767cd

#cd37b2 · #b2cd37

Split-complementary

Open in tool →

#cd3767 · #cd9e37

#9e37cd · #cd5337 · #67cd37

Contrast

#37b2cd as textRatioAAAA largeAAAFix
Aaon white
2.5:1failfailfail
  • AA: use #257f93 as the text (4.63:1)
  • AAA: use #1c5f6e as the text (7.21:1)
  • AA: or shift the background to #383838 (4.7:1)
  • AAA: or shift the background to #171717 (7.18:1)
Aaon black
8.41:1passpasspassPasses 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 #37b2cd as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#37b2cd reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #37b2cd
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 #37b2cd and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/37b2cd-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