Color

#4ea1ef

#4ea1ef
hex#4ea1ef
rgbrgb(78, 161, 239)
hslhsl(209, 83%, 62%)
oklchoklch(0.692 0.141 249.3)
Closest name: Cerulean (#55aaee)Relative luminance 0.3334

Colors that go with #4ea1ef

Charcoal, Medium Sea Green and Peru 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 →

#ef9b4e

#4eefec · #4e50ef

#ef4ea1 · #a1ef4e

Split-complementary

Open in tool →

#ef4e50 · #efec4e

#ec4eef · #ef9b4e · #50ef4e

Contrast

#4ea1ef as textRatioAAAA largeAAAFix
Aaon white
2.74:1failfailfail
  • AA: use #1476d2 as the text (4.61:1)
  • AAA: use #0f599f as the text (7.12:1)
  • AA: or shift the background to #333333 (4.61:1)
  • AAA: or shift the background to #0d0d0d (7.1:1)
Aaon black
7.67:1passpasspassPasses 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 #4ea1ef 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

#4ea1ef reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #4ea1ef
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 #4ea1ef and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/4ea1ef-9cacc4-df4e4e-1f212d-e9f1f1?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