Color

#3a01e4

#3a01e4
hex#3a01e4
rgbrgb(58, 1, 228)
hslhsl(255, 99%, 45%)
oklchoklch(0.437 0.275 274.4)
Closest name: Bluebonnet (#1c1cf0)Relative luminance 0.0652

Colors that go with #3a01e4

Charcoal, Cobalt Blue and Cornflower 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 →

#ace401

#013ae4 · #ac01e4

#e43a01 · #01e43a

Split-complementary

Open in tool →

#e4ac01 · #3ae401

#e4013a · #ace401 · #01e4ac

Contrast

#3a01e4 as textRatioAAAA largeAAAFix
Aaon white
9.11:1passpasspassPasses AAA — no fix needed.
Aaon black
2.3:1failfailfail
  • AA: use #7d52fe as the text (4.51:1)
  • AAA: use #a080fe as the text (7.01:1)
  • AA: or shift the background to #b8b8b8 (4.59:1)
  • AAA: or shift the background to #e3e3e3 (7.1:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3a01e4 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

#3a01e4 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3a01e4
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 #3a01e4 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3a01e4-ab9cc4-dfbd4e-291f2d-e9ebf1?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