Color

#66b2fa

#66b2fa
hex#66b2fa
rgbrgb(102, 178, 250)
hslhsl(209, 94%, 69%)
oklchoklch(0.744 0.129 248.8)
Closest name: Fennel Flower (#77aaff)Relative luminance 0.4157

Colors that go with #66b2fa

Charcoal, Goldenrod 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 →

#faad66

#66faf8 · #6668fa

#fa66b2 · #b2fa66

Split-complementary

Open in tool →

#fa6668 · #faf866

#f866fa · #faad66 · #68fa66

Contrast

#66b2fa as textRatioAAAA largeAAAFix
Aaon white
2.25:1failfailfail
  • AA: use #0776df as the text (4.5:1)
  • AAA: use #0557a3 as the text (7.24:1)
  • AA: or shift the background to #404040 (4.6:1)
  • AAA: or shift the background to #212121 (7.14:1)
Aaon black
9.31:1passpasspassPasses 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 #66b2fa as the background.

Brands using this color

Fonts for this mood

#66b2fa reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #66b2fa
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 #66b2fa and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/66b2fa-9cacc4-df4e4e-1f212d-e9f1f1?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