Color

#4e75e9

#4e75e9
hex#4e75e9
rgbrgb(78, 117, 233)
hslhsl(225, 78%, 61%)
oklchoklch(0.595 0.181 266.9)
Closest name: Blue Öyster Cult (#5577ee)Relative luminance 0.2023

Colors that go with #4e75e9

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 →

#e9c24e

#4ec2e9 · #754ee9

#e94e75 · #75e94e

Split-complementary

Open in tool →

#e9754e · #c2e94e

#e94ec2 · #e9c24e · #4ee975

Contrast

#4e75e9 as textRatioAAAA largeAAAFix
Aaon white
4.16:1failpassfail
  • AA: use #456ee8 as the text (4.52:1)
  • AAA: use #1a49d5 as the text (7.1:1)
  • AA: or shift the background to #121212 (4.5:1)
Aaon black
5.05:1passpassfail

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #4e75e9 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

#4e75e9 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #4e75e9
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 #4e75e9 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/4e75e9-9ca1c4-df754e-221f2d-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