Color

#405eb0

#405eb0
hex#405eb0
rgbrgb(64, 94, 176)
hslhsl(224, 47%, 47%)
oklchoklch(0.502 0.135 266.5)
Closest name: Blasphemous Blue (#3356aa)Relative luminance 0.1223

Colors that go with #405eb0

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 →

#b09240

#4096b0 · #5a40b0

#b0405e · #5eb040

Split-complementary

Open in tool →

#b05a40 · #96b040

#b04096 · #b09240 · #40b05a

Contrast

#405eb0 as textRatioAAAA largeAAAFix
Aaon white
6.09:1passpassfail
  • AAA: use #39549d as the text (7.17:1)
Aaon black
3.45:1failpassfail
  • AA: use #5673c2 as the text (4.63:1)
  • AAA: use #8095d1 as the text (7.14:1)
  • AA: or shift the background to #dedede (4.53:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #405eb0 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

#405eb0 reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #405eb0
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 #405eb0 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/405eb0-9ca2c4-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