Color

#404db5

#404db5
hex#404db5
rgbrgb(64, 77, 181)
hslhsl(233, 48%, 48%)
oklchoklch(0.471 0.164 273)
Closest name: Blasphemous Blue (#3356aa)Relative luminance 0.0973

Tints & shades

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

Harmonies

Complementary

Open in tool →

#b5a740

#4088b5 · #6d40b5

#b5404d · #4db540

Split-complementary

Open in tool →

#b56d40 · #88b540

#b54088 · #b5a740 · #40b56d

Contrast

#404db5 as textRatioAAAA largeAAAFix
Aaon white
7.13:1passpasspassPasses AAA — no fix needed.
Aaon black
2.95:1failfailfail
  • AA: use #6470c9 as the text (4.7:1)
  • AAA: use #8a93d6 as the text (7.23:1)
  • AA: or shift the background to #cfcfcf (4.57:1)
  • AAA: or shift the background to #ffffff (7.13:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #404db5 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

#404db5 reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #404db5
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 #404db5 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/404db5-9c9cc4-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