Color

#4b6efb

#4b6efb
hex#4b6efb
rgbrgb(75, 110, 251)
hslhsl(228, 96%, 64%)
oklchoklch(0.594 0.213 268.5)
Closest name: Blue Öyster Cult (#5577ee)Relative luminance 0.1961

Colors that go with #4b6efb

Charcoal, Crimson 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 →

#fbd84b

#4bc6fb · #804bfb

#fb4b6e · #6efb4b

Split-complementary

Open in tool →

#fb804b · #c6fb4b

#fb4bc6 · #fbd84b · #4bfb80

Contrast

#4b6efb as textRatioAAAA largeAAAFix
Aaon white
4.27:1failpassfail
  • AA: use #4166fb as the text (4.65:1)
  • AAA: use #0a3afa as the text (7:1)
  • AA: or shift the background to #0d0d0d (4.56:1)
Aaon black
4.92:1passpassfail

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #4b6efb 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

#4b6efb reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #4b6efb
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 #4b6efb and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/4b6efb-9c9fc4-df7c4e-231f2d-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