Color

#3db1ff

#3db1ff
hex#3db1ff
rgbrgb(61, 177, 255)
hslhsl(204, 100%, 62%)
oklchoklch(0.731 0.152 242.9)
Closest name: Cerulean (#55aaee)Relative luminance 0.3966

Tints & shades

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

Harmonies

Complementary

Open in tool →

#ff8b3d

#3dffec · #3d51ff

#ff3db1 · #b1ff3d

Split-complementary

Open in tool →

#ff3d51 · #ffec3d

#ec3dff · #ff8b3d · #51ff3d

Contrast

#3db1ff as textRatioAAAA largeAAAFix
Aaon white
2.35:1failfailfail
  • AA: use #007acc as the text (4.51:1)
  • AAA: use #005c99 as the text (7.02:1)
  • AA: or shift the background to #3d3d3d (4.62:1)
  • AAA: or shift the background to #1f1f1f (7.01:1)
Aaon black
8.93:1passpasspassPasses 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 #3db1ff as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#3db1ff reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3db1ff
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 #3db1ff and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3db1ff-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