Color

#3aaddf

#3aaddf
hex#3aaddf
rgbrgb(58, 173, 223)
hslhsl(198, 72%, 55%)
oklchoklch(0.705 0.124 231.4)
Closest name: Cousteau (#55a9d6)Relative luminance 0.3611

Colors that go with #3aaddf

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 →

#df6b3a

#3adfbe · #3a5bdf

#df3aad · #addf3a

Split-complementary

Open in tool →

#df3a5b · #dfbe3a

#be3adf · #df6b3a · #5bdf3a

Contrast

#3aaddf as textRatioAAAA largeAAAFix
Aaon white
2.55:1failfailfail
  • AA: use #1b7da7 as the text (4.63:1)
  • AAA: use #155f7f as the text (7.06:1)
  • AA: or shift the background to #383838 (4.59:1)
  • AAA: or shift the background to #171717 (7.02:1)
Aaon black
8.22:1passpasspassPasses 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 #3aaddf as the background.

Brands using this color

Fonts for this mood

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

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

tool url/palettes/new/3aaddf-9cb3c4-df4e69-1f232d-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