Color

#10286a

#10286a
hex#10286a
rgbrgb(16, 40, 106)
hslhsl(224, 74%, 24%)
oklchoklch(0.305 0.119 264.8)
Closest name: Black Sea Night (#052462)Relative luminance 0.0267

Colors that go with #10286a

Charcoal, Steel Blue and 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 →

#6a5210

#10556a · #25106a

#6a1028 · #286a10

Split-complementary

Open in tool →

#6a2510 · #556a10

#6a1055 · #6a5210 · #106a25

Contrast

#10286a as textRatioAAAA largeAAAFix
Aaon white
13.69:1passpasspassPasses AAA — no fix needed.
Aaon black
1.53:1failfailfail
  • AA: use #456fe3 as the text (4.64:1)
  • AAA: use #7595ea as the text (7.24:1)
  • AA: or shift the background to #949494 (4.51:1)
  • AAA: or shift the background to #bababa (7.06:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #10286a as the background.

Brands using this color

Fonts for this mood

#10286a reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #10286a
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 #10286a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/10286a-9ca2c4-df724e-221f2d-e9eff1?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