Color

#3eb0e5

#3eb0e5
hex#3eb0e5
rgbrgb(62, 176, 229)
hslhsl(199, 76%, 57%)
oklchoklch(0.716 0.126 232.9)
Closest name: Cousteau (#55a9d6)Relative luminance 0.3773

Colors that go with #3eb0e5

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 →

#e5733e

#3ee5c6 · #3e5de5

#e53eb0 · #b0e53e

Split-complementary

Open in tool →

#e53e5d · #e5c63e

#c63ee5 · #e5733e · #5de53e

Contrast

#3eb0e5 as textRatioAAAA largeAAAFix
Aaon white
2.46:1failfailfail
  • AA: use #177cab as the text (4.66:1)
  • AAA: use #125f82 as the text (7.04:1)
  • AA: or shift the background to #3b3b3b (4.56:1)
  • AAA: or shift the background to #1a1a1a (7.08:1)
Aaon black
8.55:1passpasspassPasses 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 #3eb0e5 as the background.

Brands using this color

Fonts for this mood

#3eb0e5 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3eb0e5
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 #3eb0e5 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3eb0e5-9cb3c4-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