Color

#100381

#100381
hex#100381
rgbrgb(16, 3, 129)
hslhsl(246, 95%, 26%)
oklchoklch(0.281 0.183 268.8)
Closest name: navy (#000080)Relative luminance 0.0176

Tints & shades

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

Harmonies

Complementary

Open in tool →

#758103

#033681 · #4f0381

#811003 · #038110

Split-complementary

Open in tool →

#814f03 · #368103

#810336 · #758103 · #03814f

Contrast

#100381 as textRatioAAAA largeAAAFix
Aaon white
15.53:1passpasspassPasses AAA — no fix needed.
Aaon black
1.35:1failfailfail
  • AA: use #6b5bfb as the text (4.51:1)
  • AAA: use #9388fc as the text (7.17:1)
  • AA: or shift the background to #8c8c8c (4.62:1)
  • AAA: or shift the background to #b0b0b0 (7.16:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #100381 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

#100381 reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #100381
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 #100381 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/100381-a59cc4-dfa74e-271f2d-e9ecf1?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