Color

#424db3

#424db3
hex#424db3
rgbrgb(66, 77, 179)
hslhsl(234, 46%, 48%)
oklchoklch(0.471 0.16 273.9)
Closest name: Blasphemous Blue (#3356aa)Relative luminance 0.0972

Tints & shades

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

Harmonies

Complementary

Open in tool →

#b3a742

#4286b3 · #6f42b3

#b3424d · #4db342

Split-complementary

Open in tool →

#b36f42 · #86b342

#b34286 · #b3a742 · #42b36f

Contrast

#424db3 as textRatioAAAA largeAAAFix
Aaon white
7.13:1passpasspassPasses AAA — no fix needed.
Aaon black
2.94:1failfailfail
  • AA: use #6670c7 as the text (4.71:1)
  • AAA: use #8c93d4 as the text (7.24:1)
  • AA: or shift the background to #cfcfcf (4.58:1)
  • 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 #424db3 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

#424db3 reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #424db3
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 #424db3 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/424db3-9d9cc4-df8a4e-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