Color

#3fcbe4

#3fcbe4
hex#3fcbe4
rgbrgb(63, 203, 228)
hslhsl(189, 75%, 57%)
oklchoklch(0.779 0.121 212.3)
Closest name: darkturquoise (#00ced1)Relative luminance 0.4937

Tints & shades

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

Harmonies

Complementary

Open in tool →

#e4583f

#3fe4aa · #3f79e4

#e43fcb · #cbe43f

Split-complementary

Open in tool →

#e43f79 · #e4aa3f

#aa3fe4 · #e4583f · #79e43f

Contrast

#3fcbe4 as textRatioAAAA largeAAAFix
Aaon white
1.93:1failfailfail
  • AA: use #158093 as the text (4.62:1)
  • AAA: use #106170 as the text (7.08:1)
  • AA: or shift the background to #4a4a4a (4.59:1)
  • AAA: or shift the background to #2e2e2e (7.03:1)
Aaon black
10.87:1passpasspassPasses 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 #3fcbe4 as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

Fonts for this mood

#3fcbe4 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3fcbe4
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 #3fcbe4 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3fcbe4-a2b7be-df4e7e-1f252d-e9f1ee?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