Color

#4daff5

#4daff5
hex#4daff5
rgbrgb(77, 175, 245)
hslhsl(205, 89%, 63%)
oklchoklch(0.726 0.137 243)
Closest name: Cerulean (#55aaee)Relative luminance 0.3883

Colors that go with #4daff5

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 →

#f5934d

#4df5e7 · #4d5bf5

#f54daf · #aff54d

Split-complementary

Open in tool →

#f54d5b · #f5e74d

#e74df5 · #f5934d · #5bf54d

Contrast

#4daff5 as textRatioAAAA largeAAAFix
Aaon white
2.4:1failfailfail
  • AA: use #0c78c6 as the text (4.65:1)
  • AAA: use #095b95 as the text (7.14:1)
  • AA: or shift the background to #3d3d3d (4.53:1)
  • AAA: or shift the background to #1c1c1c (7.11:1)
Aaon black
8.77:1passpasspassPasses 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 #4daff5 as the background.

Brands using this color

Fonts for this mood

#4daff5 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #4daff5
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 #4daff5 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/4daff5-9cafc4-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