Color

#37aee1

#37aee1
hex#37aee1
rgbrgb(55, 174, 225)
hslhsl(198, 74%, 55%)
oklchoklch(0.708 0.126 231.3)
Closest name: Cousteau (#55a9d6)Relative luminance 0.3652

Colors that go with #37aee1

Charcoal, Amber and Blue lead the list. Each partner is a real named colour with the reason it works — a wheel relationship, a neutral that carries it, or a pairing lifted from a palette or brand system that actually shipped — and every pair opens in the palette tool.

Tints & shades

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

Harmonies

Complementary

Open in tool →

#e16a37

#37e1bf · #3759e1

#e137ae · #aee137

Split-complementary

Open in tool →

#e13759 · #e1bf37

#bf37e1 · #e16a37 · #59e137

Contrast

#37aee1 as textRatioAAAA largeAAAFix
Aaon white
2.53:1failfailfail
  • AA: use #197ea9 as the text (4.57:1)
  • AAA: use #135d7c as the text (7.28:1)
  • AA: or shift the background to #383838 (4.64:1)
  • AAA: or shift the background to #171717 (7.09:1)
Aaon black
8.3:1passpasspassPasses 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 #37aee1 as the background.

Brands using this color

Fonts for this mood

#37aee1 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #37aee1
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — direct_palette, edit_direction, check_palette, check_contrast — read-only, no key. Every direction it proposes comes with a /colors/d/… link: open it, lock what you like, paste the link back, and the agent edits rather than re-rolls.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #37aee1 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/37aee1-9cb3c4-df4e69-1f232d-e9f1f0?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