Color

#404ea5

#404ea5
hex#404ea5
rgbrgb(64, 78, 165)
hslhsl(232, 44%, 45%)
oklchoklch(0.461 0.14 272.8)
Closest name: Blasphemous Blue (#3356aa)Relative luminance 0.0926

Tints & shades

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

Harmonies

Complementary

Open in tool →

#a59840

#4080a5 · #6540a5

#a5404e · #4ea540

Split-complementary

Open in tool →

#a56540 · #80a540

#a54080 · #a59840 · #40a565

Contrast

#404ea5 as textRatioAAAA largeAAAFix
Aaon white
7.37:1passpasspassPasses AAA — no fix needed.
Aaon black
2.85:1failfailfail
  • AA: use #616ec2 as the text (4.52:1)
  • AAA: use #8993d1 as the text (7.16:1)
  • AA: or shift the background to #cccccc (4.59:1)
  • AAA: or shift the background to #fafafa (7.06:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #404ea5 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

#404ea5 reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #404ea5
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 #404ea5 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/404ea5-9c9dc4-df864e-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