Color

#0903ba

#0903ba
hex#0903ba
rgbrgb(9, 3, 186)
hslhsl(242, 97%, 37%)
oklchoklch(0.36 0.245 265.3)
Closest name: Dark Galaxy (#0018a8)Relative luminance 0.0367

Colors that go with #0903ba

Charcoal, Crimson and Cobalt 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 →

#b4ba03

#0358ba · #6403ba

#ba0903 · #03ba09

Split-complementary

Open in tool →

#ba6403 · #58ba03

#ba0358 · #b4ba03 · #03ba64

Contrast

#0903ba as textRatioAAAA largeAAAFix
Aaon white
12.11:1passpasspassPasses AAA — no fix needed.
Aaon black
1.73:1failfailfail
  • AA: use #645efd as the text (4.56:1)
  • AAA: use #8f8bfd as the text (7.28:1)
  • AA: or shift the background to #9e9e9e (4.52:1)
  • AAA: or shift the background to #c7c7c7 (7.17:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #0903ba as the background.

Brands using this color

Fonts for this mood

#0903ba reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #0903ba
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 #0903ba and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/0903ba-a29cc4-df9e4e-261f2d-e9edf1?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