Color

#3437ea

#3437ea
hex#3437ea
rgbrgb(52, 55, 234)
hslhsl(239, 81%, 56%)
oklchoklch(0.479 0.256 270.7)
Closest name: Blustering Blue (#4411ff)Relative luminance 0.094

Colors that go with #3437ea

Charcoal, Sea Green 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 →

#eae734

#3492ea · #8c34ea

#ea3437 · #37ea34

Split-complementary

Open in tool →

#ea8c34 · #92ea34

#ea3492 · #eae734 · #34ea8c

Contrast

#3437ea as textRatioAAAA largeAAAFix
Aaon white
7.29:1passpasspassPasses AAA — no fix needed.
Aaon black
2.88:1failfailfail
  • AA: use #6264ef as the text (4.59:1)
  • AAA: use #8c8df3 as the text (7.22:1)
  • AA: or shift the background to #cccccc (4.54:1)
  • AAA: or shift the background to #fcfcfc (7.11:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3437ea 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

#3437ea reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3437ea
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 #3437ea and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3437ea-a09cc4-df964e-251f2d-e9edf1?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