Color

#3f058a

#3f058a
hex#3f058a
rgbrgb(63, 5, 138)
hslhsl(266, 93%, 28%)
oklchoklch(0.335 0.183 291.7)
Closest name: Indigo Static (#4b0183)Relative luminance 0.03

Tints & shades

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

Harmonies

Complementary

Open in tool →

#508a05

#050e8a · #81058a

#8a3f05 · #058a3f

Split-complementary

Open in tool →

#8a8105 · #0e8a05

#8a050e · #508a05 · #058a81

Contrast

#3f058a as textRatioAAAA largeAAAFix
Aaon white
13.12:1passpasspassPasses AAA — no fix needed.
Aaon black
1.6:1failfailfail
  • AA: use #9549f8 as the text (4.59:1)
  • AAA: use #b27afa as the text (7.06:1)
  • AA: or shift the background to #999999 (4.61:1)
  • AAA: or shift the background to #bfbfbf (7.14:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3f058a 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

#3f058a reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3f058a
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 #3f058a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3f058a-b29cc4-dfd74e-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