Color

#15049a

#15049a
hex#15049a
rgbrgb(21, 4, 154)
hslhsl(247, 95%, 31%)
oklchoklch(0.32 0.208 268.8)
Closest name: Everlasting Night (#000099)Relative luminance 0.0258

Colors that go with #15049a

Steel Blue, Crimson and Royal Blue lead the list. Each partner is a real named colour with the reason it works — a wheel relationship, a neutral that carries it, or a pairing lifted from a palette or brand system that actually shipped — and every pair opens in the palette tool.

Tints & shades

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

Harmonies

Complementary

Open in tool →

#899a04

#043e9a · #61049a

#9a1504 · #049a15

Split-complementary

Open in tool →

#9a6104 · #3e9a04

#9a043e · #899a04 · #049a61

Contrast

#15049a as textRatioAAAA largeAAAFix
Aaon white
13.85:1passpasspassPasses AAA — no fix needed.
Aaon black
1.52:1failfailfail
  • AA: use #6e5bfb as the text (4.55:1)
  • AAA: use #9588fc as the text (7.21:1)
  • AA: or shift the background to #949494 (4.57:1)
  • AAA: or shift the background to #bababa (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 #15049a as the background.

Brands using this color

Fonts for this mood

#15049a reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #15049a
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — direct_palette, edit_direction, check_palette, check_contrast — read-only, no key. Every direction it proposes comes with a /colors/d/… link: open it, lock what you like, paste the link back, and the agent edits rather than re-rolls.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #15049a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/15049a-a59cc4-dfaa4e-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