Color

#0a121f

#0a121f
hex#0a121f
rgbrgb(10, 18, 31)
hslhsl(217, 51%, 8%)
oklchoklch(0.182 0.03 259.8)
Closest name: Midnight Edition (#0c121b)Relative luminance 0.006

Tints & shades

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

Harmonies

Complementary

Open in tool →

#1f170a

#0a1c1f · #0c0a1f

#1f0a12 · #121f0a

Split-complementary

Open in tool →

#1f0c0a · #1c1f0a

#1f0a1c · #1f170a · #0a1f0c

Contrast

#0a121f as textRatioAAAA largeAAAFix
Aaon white
18.76:1passpasspassPasses AAA — no fix needed.
Aaon black
1.12:1failfailfail
  • AA: use #4676c3 as the text (4.64:1)
  • AAA: use #7498d2 as the text (7.16:1)
  • AA: or shift the background to #7d7d7d (4.56:1)
  • AAA: or shift the background to #9e9e9e (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 #0a121f as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#0a121f reads as cool, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #0a121f
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 #0a121f and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/0a121f-9ca7c4-df624e-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