Color

#64b5dd

#64b5dd
hex#64b5dd
rgbrgb(100, 181, 221)
hslhsl(200, 64%, 63%)
oklchoklch(0.737 0.098 231.7)
Closest name: Blue Martini (#52b4d3)Relative luminance 0.4098

Colors that go with #64b5dd

Charcoal, Dark Salmon 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 →

#dd8d64

#64ddc9 · #6478dd

#dd64b5 · #b5dd64

Split-complementary

Open in tool →

#dd6478 · #ddc964

#c964dd · #dd8d64 · #78dd64

Contrast

#64b5dd as textRatioAAAA largeAAAFix
Aaon white
2.28:1failfailfail
  • AA: use #257ca7 as the text (4.65:1)
  • AAA: use #1c5d7d as the text (7.21:1)
  • AA: or shift the background to #404040 (4.54:1)
  • AAA: or shift the background to #212121 (7.05:1)
Aaon black
9.2:1passpasspassPasses 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 #64b5dd as the background.

Brands using this color

Fonts for this mood

#64b5dd reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #64b5dd
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 #64b5dd and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/64b5dd-9cb2c4-df4e64-1f232d-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