Color

#37b8eb

#37b8eb
hex#37b8eb
rgbrgb(55, 184, 235)
hslhsl(197, 82%, 57%)
oklchoklch(0.736 0.13 229.5)
Closest name: Blue Bikini (#00bbee)Relative luminance 0.4109

Colors that go with #37b8eb

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 →

#eb6a37

#37ebc4 · #375eeb

#eb37b8 · #b8eb37

Split-complementary

Open in tool →

#eb375e · #ebc437

#c437eb · #eb6a37 · #5eeb37

Contrast

#37b8eb as textRatioAAAA largeAAAFix
Aaon white
2.28:1failfailfail
  • AA: use #117ca7 as the text (4.7:1)
  • AAA: use #0c5d7d as the text (7.3:1)
  • AA: or shift the background to #404040 (4.55:1)
  • AAA: or shift the background to #212121 (7.07:1)
Aaon black
9.22:1passpasspassPasses 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 #37b8eb as the background.

Brands using this color

Fonts for this mood

#37b8eb reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #37b8eb
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 #37b8eb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/37b8eb-9cb4c4-df4e6b-1f232d-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