Color

#4db4fe

#4db4fe
hex#4db4fe
rgbrgb(77, 180, 254)
hslhsl(205, 99%, 65%)
oklchoklch(0.742 0.143 243.4)
Closest name: Cerulean (#55aaee)Relative luminance 0.4138

Colors that go with #4db4fe

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 →

#fe974d

#4dfeef · #4d5cfe

#fe4db4 · #b4fe4d

Split-complementary

Open in tool →

#fe4d5c · #feef4d

#ef4dfe · #fe974d · #5cfe4d

Contrast

#4db4fe as textRatioAAAA largeAAAFix
Aaon white
2.26:1failfailfail
  • AA: use #0177cb as the text (4.66:1)
  • AAA: use #015998 as the text (7.28:1)
  • AA: or shift the background to #404040 (4.58:1)
  • AAA: or shift the background to #212121 (7.11:1)
Aaon black
9.28:1passpasspassPasses 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 #4db4fe as the background.

Brands using this color

Fonts for this mood

#4db4fe reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #4db4fe
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 #4db4fe and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/4db4fe-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