Color

#405ac4

#405ac4
hex#405ac4
rgbrgb(64, 90, 196)
hslhsl(228, 53%, 51%)
oklchoklch(0.508 0.168 269.2)
Closest name: God of Rain (#4466cc)Relative luminance 0.1239

Colors that go with #405ac4

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 →

#c4aa40

#409dc4 · #6840c4

#c4405a · #5ac440

Split-complementary

Open in tool →

#c46840 · #9dc440

#c4409d · #c4aa40 · #40c468

Contrast

#405ac4 as textRatioAAAA largeAAAFix
Aaon white
6.04:1passpassfail
  • AAA: use #3750b3 as the text (7.09:1)
Aaon black
3.48:1failpassfail
  • AA: use #5b72cd as the text (4.73:1)
  • AAA: use #8293d9 as the text (7.12:1)
  • AA: or shift the background to #e0e0e0 (4.57:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #405ac4 as the background.

Brands using this color

Fonts for this mood

#405ac4 reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #405ac4
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 #405ac4 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/405ac4-9c9fc4-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