Color

#3db4eb

#3db4eb
hex#3db4eb
rgbrgb(61, 180, 235)
hslhsl(199, 81%, 58%)
oklchoklch(0.728 0.13 233)
Closest name: Blue Bikini (#00bbee)Relative luminance 0.3963

Colors that go with #3db4eb

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 →

#eb743d

#3debcb · #3d5deb

#eb3db4 · #b4eb3d

Split-complementary

Open in tool →

#eb3d5d · #ebcb3d

#cb3deb · #eb743d · #5deb3d

Contrast

#3db4eb as textRatioAAAA largeAAAFix
Aaon white
2.35:1failfailfail
  • AA: use #127eaf as the text (4.54:1)
  • AAA: use #0e5d81 as the text (7.24:1)
  • AA: or shift the background to #3d3d3d (4.62:1)
  • AAA: or shift the background to #1f1f1f (7.01:1)
Aaon black
8.93:1passpasspassPasses 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 #3db4eb as the background.

Brands using this color

Fonts for this mood

#3db4eb reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3db4eb
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 #3db4eb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3db4eb-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