Color

#3eb4ef

#3eb4ef
hex#3eb4ef
rgbrgb(62, 180, 239)
hslhsl(200, 85%, 59%)
oklchoklch(0.73 0.133 235)
Closest name: Blue Bikini (#00bbee)Relative luminance 0.399

Colors that go with #3eb4ef

Charcoal, Dark Orange and Midnight 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 →

#ef793e

#3eefd2 · #3e5bef

#ef3eb4 · #b4ef3e

Split-complementary

Open in tool →

#ef3e5b · #efd23e

#d23eef · #ef793e · #5bef3e

Contrast

#3eb4ef as textRatioAAAA largeAAAFix
Aaon white
2.34:1failfailfail
  • AA: use #0f7cb3 as the text (4.61:1)
  • AAA: use #0b5c84 as the text (7.3:1)
  • AA: or shift the background to #3d3d3d (4.64:1)
  • AAA: or shift the background to #1f1f1f (7.05:1)
Aaon black
8.98:1passpasspassPasses 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 #3eb4ef as the background.

Brands using this color

Fonts for this mood

#3eb4ef reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3eb4ef
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 #3eb4ef and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3eb4ef-9cb2c4-df4e64-1f232d-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