Color

#3da5fa

#3da5fa
hex#3da5fa
rgbrgb(61, 165, 250)
hslhsl(207, 95%, 61%)
oklchoklch(0.701 0.156 247.3)
Closest name: Cerulean (#55aaee)Relative luminance 0.348

Colors that go with #3da5fa

Charcoal, Amber and Blue 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 →

#fa923d

#3dfaf1 · #3d47fa

#fa3da5 · #a5fa3d

Split-complementary

Open in tool →

#fa3d47 · #faf13d

#f13dfa · #fa923d · #47fa3d

Contrast

#3da5fa as textRatioAAAA largeAAAFix
Aaon white
2.64:1failfailfail
  • AA: use #0578d6 as the text (4.5:1)
  • AAA: use #04599f as the text (7.16:1)
  • AA: or shift the background to #363636 (4.58:1)
  • AAA: or shift the background to #121212 (7.1:1)
Aaon black
7.96:1passpasspassPasses 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 #3da5fa as the background.

Brands using this color

Fonts for this mood

#3da5fa reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3da5fa
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 #3da5fa and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3da5fa-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