Color

#3eb3ea

#3eb3ea
hex#3eb3ea
rgbrgb(62, 179, 234)
hslhsl(199, 80%, 58%)
oklchoklch(0.725 0.129 233.3)
Closest name: Blue Bikini (#00bbee)Relative luminance 0.392

Colors that go with #3eb3ea

Charcoal, Dark Orange and Amber 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 →

#ea743e

#3eeaca · #3e5eea

#ea3eb3 · #b3ea3e

Split-complementary

Open in tool →

#ea3e5e · #eaca3e

#ca3eea · #ea743e · #5eea3e

Contrast

#3eb3ea as textRatioAAAA largeAAAFix
Aaon white
2.38:1failfailfail
  • AA: use #137dae as the text (4.59:1)
  • AAA: use #0e5c81 as the text (7.33:1)
  • AA: or shift the background to #3d3d3d (4.57:1)
  • AAA: or shift the background to #1c1c1c (7.17:1)
Aaon black
8.84:1passpasspassPasses 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 #3eb3ea as the background.

Brands using this color

Fonts for this mood

#3eb3ea reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3eb3ea
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 #3eb3ea and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3eb3ea-9cb3c4-df4e66-1f232d-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