Color

#0d3d6e

#0d3d6e
hex#0d3d6e
rgbrgb(13, 61, 110)
hslhsl(210, 79%, 24%)
oklchoklch(0.358 0.098 253)
Closest name: Aegean Blue (#1b416f)Relative luminance 0.0455

Tints & shades

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

Harmonies

Complementary

Open in tool →

#6e3d0d

#0d6e6e · #0d0d6e

#6e0d3d · #3d6e0d

Split-complementary

Open in tool →

#6e0d0d · #6e6e0d

#6e0d6e · #6e3d0d · #0d6e0d

Contrast

#0d3d6e as textRatioAAAA largeAAAFix
Aaon white
11:1passpasspassPasses AAA — no fix needed.
Aaon black
1.91:1failfailfail
  • AA: use #1975d2 as the text (4.52:1)
  • AAA: use #4899ea as the text (7.02:1)
  • AA: or shift the background to #a6a6a6 (4.52:1)
  • AAA: or shift the background to #cfcfcf (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 #0d3d6e as the background.

Brands using this color

Fonts for this mood

#0d3d6e reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #0d3d6e
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 #0d3d6e and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/0d3d6e-9cabc4-df514e-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