Color

#003166

#003166
hex#003166
rgbrgb(0, 49, 102)
hslhsl(211, 100%, 20%)
oklchoklch(0.318 0.105 255.1)
Closest name: Marine (#042e60)Relative luminance 0.0316

Tints & shades

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

Harmonies

Complementary

Open in tool →

#663500

#006466 · #020066

#660031 · #316600

Split-complementary

Open in tool →

#660200 · #646600

#660064 · #663500 · #006602

Contrast

#003166 as textRatioAAAA largeAAAFix
Aaon white
12.87:1passpasspassPasses AAA — no fix needed.
Aaon black
1.63:1failfailfail
  • AA: use #0071eb as the text (4.56:1)
  • AAA: use #3898ff as the text (7.1:1)
  • AA: or shift the background to #999999 (4.52:1)
  • AAA: or shift the background to #bfbfbf (7:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #003166 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

#003166 reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #003166
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 #003166 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/003166-9cabc4-df534e-1f202d-e9f1f1?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