Color

#4f75de

#4f75de
hex#4f75de
rgbrgb(79, 117, 222)
hslhsl(224, 68%, 59%)
oklchoklch(0.588 0.165 266.4)
Closest name: Blue Öyster Cult (#5577ee)Relative luminance 0.1966

Colors that go with #4f75de

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 →

#deb84f

#4fbcde · #714fde

#de4f75 · #75de4f

Split-complementary

Open in tool →

#de714f · #bcde4f

#de4fbc · #deb84f · #4fde71

Contrast

#4f75de as textRatioAAAA largeAAAFix
Aaon white
4.26:1failpassfail
  • AA: use #476fdc as the text (4.59:1)
  • AAA: use #254ec1 as the text (7.15:1)
  • AA: or shift the background to #0f0f0f (4.5:1)
Aaon black
4.93:1passpassfail
  • AAA: use #7694e5 as the text (7.14:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #4f75de as the background.

Brands using this color

Fonts for this mood

#4f75de reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #4f75de
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 #4f75de and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/4f75de-9ca2c4-df724e-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