Color

#0d375e

#0d375e
hex#0d375e
rgbrgb(13, 55, 94)
hslhsl(209, 76%, 21%)
oklchoklch(0.331 0.082 250.7)
Closest name: Beyond the Stars (#0a3251)Relative luminance 0.0363

Tints & shades

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

Harmonies

Complementary

Open in tool →

#5e340d

#0d5e5d · #0d0e5e

#5e0d37 · #375e0d

Split-complementary

Open in tool →

#5e0d0e · #5e5d0d

#5d0d5e · #5e340d · #0e5e0d

Contrast

#0d375e as textRatioAAAA largeAAAFix
Aaon white
12.17:1passpasspassPasses AAA — no fix needed.
Aaon black
1.73:1failfailfail
  • AA: use #1c78ce as the text (4.63:1)
  • AAA: use #4b9ce7 as the text (7.21:1)
  • AA: or shift the background to #9e9e9e (4.54:1)
  • AAA: or shift the background to #c7c7c7 (7.2:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #0d375e as the background.

Brands using this color

Fonts for this mood

#0d375e reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #0d375e
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 #0d375e and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/0d375e-9cacc4-df4e4e-1f212d-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