Color

#42108e

#42108e
hex#42108e
rgbrgb(66, 16, 142)
hslhsl(264, 80%, 31%)
oklchoklch(0.35 0.181 291.5)
Closest name: Galactic Civilization (#442288)Relative luminance 0.0348

Tints & shades

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

Harmonies

Complementary

Open in tool →

#5c8e10

#101c8e · #82108e

#8e4210 · #108e42

Split-complementary

Open in tool →

#8e8210 · #1c8e10

#8e101c · #5c8e10 · #108e82

Contrast

#42108e as textRatioAAAA largeAAAFix
Aaon white
12.38:1passpasspassPasses AAA — no fix needed.
Aaon black
1.7:1failfailfail
  • AA: use #8f51ec as the text (4.56:1)
  • AAA: use #ac7ef1 as the text (7.01:1)
  • AA: or shift the background to #9c9c9c (4.51:1)
  • AAA: or shift the background to #c4c4c4 (7.1:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #42108e 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

#42108e reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #42108e
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 #42108e and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/42108e-b19cc4-dfd34e-2b1f2d-e9eaf1?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