Color

#10039b

#10039b
hex#10039b
rgbrgb(16, 3, 155)
hslhsl(245, 96%, 31%)
oklchoklch(0.318 0.211 267.4)
Closest name: Everlasting Night (#000099)Relative luminance 0.0254

Tints & shades

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

Harmonies

Complementary

Open in tool →

#8e9b03

#03429b · #5c039b

#9b1003 · #039b10

Split-complementary

Open in tool →

#9b5c03 · #429b03

#9b0342 · #8e9b03 · #039b5c

Contrast

#10039b as textRatioAAAA largeAAAFix
Aaon white
13.92:1passpasspassPasses AAA — no fix needed.
Aaon black
1.51:1failfailfail
  • AA: use #6c5ffc as the text (4.68:1)
  • AAA: use #9187fd as the text (7.09:1)
  • AA: or shift the background to #949494 (4.59:1)
  • AAA: or shift the background to #b8b8b8 (7.02:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #10039b 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

#10039b reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #10039b
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 #10039b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/10039b-a49cc4-dfa54e-261f2d-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