Color

#17039b

#17039b
hex#17039b
rgbrgb(23, 3, 155)
hslhsl(248, 96%, 31%)
oklchoklch(0.322 0.209 269.3)
Closest name: Everlasting Night (#000099)Relative luminance 0.0261

Tints & shades

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

Harmonies

Complementary

Open in tool →

#879b03

#033b9b · #63039b

#9b1703 · #039b17

Split-complementary

Open in tool →

#9b6303 · #3b9b03

#9b033b · #879b03 · #039b63

Contrast

#17039b as textRatioAAAA largeAAAFix
Aaon white
13.79:1passpasspassPasses AAA — no fix needed.
Aaon black
1.52:1failfailfail
  • AA: use #705afc as the text (4.56:1)
  • AAA: use #9787fd as the text (7.2:1)
  • AA: or shift the background to #949494 (4.55:1)
  • AAA: or shift the background to #bababa (7.11:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #17039b 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

#17039b reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #17039b
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 #17039b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/17039b-a69cc4-dfac4e-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