Color

#3a75f2

#3a75f2
hex#3a75f2
rgbrgb(58, 117, 242)
hslhsl(221, 88%, 59%)
oklchoklch(0.593 0.198 262.8)
Closest name: Blue Öyster Cult (#5577ee)Relative luminance 0.2003

Colors that go with #3a75f2

Charcoal, Crimson and Copper 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 →

#f2b83a

#3ad1f2 · #5c3af2

#f23a75 · #75f23a

Split-complementary

Open in tool →

#f25c3a · #d1f23a

#f23ad1 · #f2b83a · #3af25c

Contrast

#3a75f2 as textRatioAAAA largeAAAFix
Aaon white
4.19:1failpassfail
  • AA: use #316ef2 as the text (4.52:1)
  • AAA: use #0d4cd3 as the text (7.02:1)
  • AA: or shift the background to #0f0f0f (4.57:1)
Aaon black
5.01:1passpassfail
  • AAA: use #6693f5 as the text (7.06:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3a75f2 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

#3a75f2 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3a75f2
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 #3a75f2 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3a75f2-9ca4c4-df6b4e-211f2d-e9eff1?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