Color

#404ca5

#404ca5
hex#404ca5
rgbrgb(64, 76, 165)
hslhsl(233, 44%, 45%)
oklchoklch(0.457 0.143 273.6)
Closest name: Blasphemous Blue (#3356aa)Relative luminance 0.0898

Tints & shades

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

Harmonies

Complementary

Open in tool →

#a59940

#407fa5 · #6740a5

#a5404c · #4ca540

Split-complementary

Open in tool →

#a56740 · #7fa540

#a5407f · #a59940 · #40a567

Contrast

#404ca5 as textRatioAAAA largeAAAFix
Aaon white
7.51:1passpasspassPasses AAA — no fix needed.
Aaon black
2.8:1failfailfail
  • AA: use #6570c3 as the text (4.66:1)
  • AAA: use #8992d1 as the text (7.1:1)
  • AA: or shift the background to #c9c9c9 (4.54:1)
  • AAA: or shift the background to #f7f7f7 (7.01:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #404ca5 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

#404ca5 reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #404ca5
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — generate_palette, check_contrast, analyze_color — read-only, no key. Every palette it proposes comes with a /palettes/new/… link: open it, lock what you like, paste the link back.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #404ca5 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/404ca5-9c9cc4-df884e-241f2d-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