Color

#4b579b

#4b579b
hex#4b579b
rgbrgb(75, 87, 155)
hslhsl(231, 35%, 45%)
oklchoklch(0.48 0.11 274)
Closest name: Blasphemous Blue (#3356aa)Relative luminance 0.1068

Colors that go with #4b579b

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 →

#9b8f4b

#4b7f9b · #674b9b

#9b4b57 · #579b4b

Split-complementary

Open in tool →

#9b674b · #7f9b4b

#9b4b7f · #9b8f4b · #4b9b67

Contrast

#4b579b as textRatioAAAA largeAAAFix
Aaon white
6.7:1passpassfail
  • AAA: use #475394 as the text (7.16:1)
Aaon black
3.14:1failpassfail
  • AA: use #6470b4 as the text (4.52:1)
  • AAA: use #8a93c7 as the text (7.08:1)
  • AA: or shift the background to #d4d4d4 (4.52:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #4b579b 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

#4b579b reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #4b579b
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 #4b579b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/4b579b-9c9ec4-df834e-231f2d-e9eef1?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