Color

#3ba5fc

#3ba5fc
hex#3ba5fc
rgbrgb(59, 165, 252)
hslhsl(207, 97%, 61%)
oklchoklch(0.702 0.159 247.6)
Closest name: Cerulean (#55aaee)Relative luminance 0.3487

Colors that go with #3ba5fc

Charcoal, Tomato and Amber lead the list. Each partner is a real named colour with the reason it works — a wheel relationship, a neutral that carries it, or a pairing lifted from a palette or brand system that actually shipped — and every pair opens in the palette tool.

Tints & shades

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

Harmonies

Complementary

Open in tool →

#fc923b

#3bfcf2 · #3b45fc

#fc3ba5 · #a5fc3b

Split-complementary

Open in tool →

#fc3b45 · #fcf23b

#f23bfc · #fc923b · #45fc3b

Contrast

#3ba5fc as textRatioAAAA largeAAAFix
Aaon white
2.63:1failfailfail
  • AA: use #0375d3 as the text (4.68:1)
  • AAA: use #025aa1 as the text (7.05:1)
  • AA: or shift the background to #363636 (4.59:1)
  • AAA: or shift the background to #121212 (7.11:1)
Aaon black
7.97:1passpasspassPasses 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 #3ba5fc as the background.

Brands using this color

Fonts for this mood

#3ba5fc reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3ba5fc
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — direct_palette, edit_direction, check_palette, check_contrast — read-only, no key. Every direction it proposes comes with a /colors/d/… link: open it, lock what you like, paste the link back, and the agent edits rather than re-rolls.

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

analyze #3ba5fc and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3ba5fc-9cadc4-df4e53-1f212d-e9f1f1?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