Color

#3da8eb

#3da8eb
hex#3da8eb
rgbrgb(61, 168, 235)
hslhsl(203, 81%, 58%)
oklchoklch(0.7 0.137 240.7)
Closest name: Cerulean (#55aaee)Relative luminance 0.35

Tints & shades

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

Harmonies

Complementary

Open in tool →

#eb803d

#3debd6 · #3d51eb

#eb3da8 · #a8eb3d

Split-complementary

Open in tool →

#eb3d51 · #ebd63d

#d63deb · #eb803d · #51eb3d

Contrast

#3da8eb as textRatioAAAA largeAAAFix
Aaon white
2.63:1failfailfail
  • AA: use #147cbd as the text (4.52:1)
  • AAA: use #0f5b8a as the text (7.28:1)
  • AA: or shift the background to #363636 (4.6:1)
  • AAA: or shift the background to #141414 (7.02:1)
Aaon black
8:1passpasspassPasses 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 #3da8eb 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

#3da8eb reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3da8eb
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 #3da8eb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3da8eb-9cb0c4-df4e5d-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