Color

#3ea5ef

#3ea5ef
hex#3ea5ef
rgbrgb(62, 165, 239)
hslhsl(205, 85%, 59%)
oklchoklch(0.696 0.143 244)
Closest name: Cerulean (#55aaee)Relative luminance 0.3417

Colors that go with #3ea5ef

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 →

#ef883e

#3eefe1 · #3e4cef

#ef3ea5 · #a5ef3e

Split-complementary

Open in tool →

#ef3e4c · #efe13e

#e13eef · #ef883e · #4cef3e

Contrast

#3ea5ef as textRatioAAAA largeAAAFix
Aaon white
2.68:1failfailfail
  • AA: use #107ac6 as the text (4.54:1)
  • AAA: use #0c5a92 as the text (7.26:1)
  • AA: or shift the background to #363636 (4.51:1)
  • AAA: or shift the background to #0f0f0f (7.15:1)
Aaon black
7.83:1passpasspassPasses 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 #3ea5ef 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

#3ea5ef reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3ea5ef
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 #3ea5ef and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3ea5ef-9cafc4-df4e58-1f212d-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