Color

#3744fb

#3744fb
hex#3744fb
rgbrgb(55, 68, 251)
hslhsl(236, 96%, 60%)
oklchoklch(0.516 0.264 269.8)
Closest name: Meteor Shower (#5533ff)Relative luminance 0.1191

Colors that go with #3744fb

Charcoal, Crimson and Sea Green 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 →

#fbee37

#37a6fb · #8c37fb

#fb3744 · #44fb37

Split-complementary

Open in tool →

#fb8c37 · #a6fb37

#fb37a6 · #fbee37 · #37fb8c

Contrast

#3744fb as textRatioAAAA largeAAAFix
Aaon white
6.21:1passpassfail
  • AAA: use #2331fb as the text (7.23:1)
Aaon black
3.38:1failpassfail
  • AA: use #5a65fc as the text (4.7:1)
  • AAA: use #878ffd as the text (7.38:1)
  • AA: or shift the background to #dedede (4.61:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3744fb as the background.

Brands using this color

Fonts for this mood

#3744fb reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3744fb
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 #3744fb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3744fb-9e9cc4-df8f4e-241f2d-e9eef1?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