Color

#37defb

#37defb
hex#37defb
rgbrgb(55, 222, 251)
hslhsl(189, 96%, 60%)
oklchoklch(0.831 0.135 212.6)
Closest name: Aqua (#0ff0fe)Relative luminance 0.6002

Tints & shades

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

Harmonies

Complementary

Open in tool →

#fb5437

#37fbb6 · #377cfb

#fb37de · #defb37

Split-complementary

Open in tool →

#fb377c · #fbb637

#b637fb · #fb5437 · #7cfb37

Contrast

#37defb as textRatioAAAA largeAAAFix
Aaon white
1.61:1failfailfail
  • AA: use #038096 as the text (4.63:1)
  • AAA: use #026273 as the text (7.01:1)
  • AA: or shift the background to #545454 (4.69:1)
  • AAA: or shift the background to #383838 (7.26:1)
Aaon black
13:1passpasspassPasses 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 #37defb 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

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

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

tool url/palettes/new/37defb-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