Color

#42589a

#42589a
hex#42589a
rgbrgb(66, 88, 154)
hslhsl(225, 40%, 43%)
oklchoklch(0.476 0.11 268.2)
Closest name: Blasphemous Blue (#3356aa)Relative luminance 0.1047

Tints & shades

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

Harmonies

Complementary

Open in tool →

#9a8442

#42849a · #58429a

#9a4258 · #589a42

Split-complementary

Open in tool →

#9a5842 · #849a42

#9a4284 · #9a8442 · #429a58

Contrast

#42589a as textRatioAAAA largeAAAFix
Aaon white
6.79:1passpassfail
  • AAA: use #405696 as the text (7.02:1)
Aaon black
3.09:1failpassfail
  • AA: use #5b72b9 as the text (4.55:1)
  • AAA: use #8294c9 as the text (7.03:1)
  • AA: or shift the background to #d4d4d4 (4.58:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #42589a 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

#42589a reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #42589a
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 #42589a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/42589a-9ca1c4-df754e-221f2d-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