Color

#10366a

#10366a
hex#10366a
rgbrgb(16, 54, 106)
hslhsl(215, 74%, 24%)
oklchoklch(0.338 0.1 257.5)
Closest name: Atlantic Navy (#13336f)Relative luminance 0.0379

Tints & shades

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

Harmonies

Complementary

Open in tool →

#6a4510

#10636a · #17106a

#6a1036 · #366a10

Split-complementary

Open in tool →

#6a1710 · #636a10

#6a1063 · #6a4510 · #106a17

Contrast

#10366a as textRatioAAAA largeAAAFix
Aaon white
11.95:1passpasspassPasses AAA — no fix needed.
Aaon black
1.76:1failfailfail
  • AA: use #2673df as the text (4.6:1)
  • AAA: use #5f98e7 as the text (7.13:1)
  • AA: or shift the background to #a1a1a1 (4.62:1)
  • AAA: or shift the background to #c7c7c7 (7.07:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #10366a as the background.

Brands using this color

Fonts for this mood

#10366a reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #10366a
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 #10366a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/10366a-9ca8c4-df5d4e-201f2d-e9f0f1?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