Color

#40528c

#40528c
hex#40528c
rgbrgb(64, 82, 140)
hslhsl(226, 37%, 40%)
oklchoklch(0.452 0.098 269.2)
Closest name: Dusk (#4e5481)Relative luminance 0.0902

Colors that go with #40528c

Charcoal, Sea Green and Steel Blue 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.

Real palettes that use #40528c

Tints & shades

Every swatch is its own page — click any to analyze it.

Harmonies

Complementary

Open in tool →

#8c7a40

#40788c · #54408c

#8c4052 · #528c40

Split-complementary

Open in tool →

#8c5440 · #788c40

#8c4078 · #8c7a40 · #408c54

Contrast

#40528c as textRatioAAAA largeAAAFix
Aaon white
7.49:1passpasspassPasses AAA — no fix needed.
Aaon black
2.8:1failfailfail
  • AA: use #5e73b5 as the text (4.6:1)
  • AAA: use #8594c7 as the text (7.06:1)
  • AA: or shift the background to #c9c9c9 (4.52:1)
  • AAA: or shift the background to #fafafa (7.18:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #40528c 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

#40528c reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #40528c
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 #40528c and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/40528c-9ca1c4-df774e-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