Color

#3aa6ee

#3aa6ee
hex#3aa6ee
rgbrgb(58, 166, 238)
hslhsl(204, 84%, 58%)
oklchoklch(0.697 0.143 242.5)
Closest name: Cerulean (#55aaee)Relative luminance 0.3435

Tints & shades

Every swatch is its own page — click any to analyze it.

Harmonies

Complementary

Open in tool →

#ee823a

#3aeedc · #3a4cee

#ee3aa6 · #a6ee3a

Split-complementary

Open in tool →

#ee3a4c · #eedc3a

#dc3aee · #ee823a · #4cee3a

Contrast

#3aa6ee as textRatioAAAA largeAAAFix
Aaon white
2.67:1failfailfail
  • AA: use #117ac0 as the text (4.6:1)
  • AAA: use #0d5c91 as the text (7.1:1)
  • AA: or shift the background to #363636 (4.53:1)
  • AAA: or shift the background to #121212 (7.02:1)
Aaon black
7.87:1passpasspassPasses 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 #3aa6ee as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#3aa6ee reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3aa6ee
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — generate_palette, check_contrast, analyze_color — read-only, no key. Every palette it proposes comes with a /palettes/new/… link: open it, lock what you like, paste the link back.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #3aa6ee and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3aa6ee-9cafc4-df4e5a-1f222d-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