Color

#3fa8ee

#3fa8ee
hex#3fa8ee
rgbrgb(63, 168, 238)
hslhsl(204, 84%, 59%)
oklchoklch(0.702 0.14 242.1)
Closest name: Cerulean (#55aaee)Relative luminance 0.3524

Tints & shades

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

Harmonies

Complementary

Open in tool →

#ee853f

#3feedd · #3f50ee

#ee3fa8 · #a8ee3f

Split-complementary

Open in tool →

#ee3f50 · #eedd3f

#dd3fee · #ee853f · #50ee3f

Contrast

#3fa8ee as textRatioAAAA largeAAAFix
Aaon white
2.61:1failfailfail
  • 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 (4.63:1)
  • AAA: or shift the background to #141414 (7.06:1)
Aaon black
8.05:1passpasspassPasses 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 #3fa8ee as the background.

Brands using this color

Fonts for this mood

#3fa8ee reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3fa8ee
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 #3fa8ee and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3fa8ee-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