Color

#0a3c42

#0a3c42
hex#0a3c42
rgbrgb(10, 60, 66)
hslhsl(186, 74%, 15%)
oklchoklch(0.328 0.051 207)
Closest name: Royal Neptune (#1c3b42)Relative luminance 0.0369

Tints & shades

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

Harmonies

Complementary

Open in tool →

#43100a

#0a432c · #0a2143

#430a3d · #3d430a

Split-complementary

Open in tool →

#430a21 · #432c0a

#2c0a43 · #43100a · #21430a

Contrast

#0a3c42 as textRatioAAAA largeAAAFix
Aaon white
12.08:1passpasspassPasses AAA — no fix needed.
Aaon black
1.74:1failfailfail
  • AA: use #15828e as the text (4.62:1)
  • AAA: use #1ba6b6 as the text (7.18:1)
  • AA: or shift the background to #9e9e9e (4.51:1)
  • AAA: or shift the background to #c7c7c7 (7.15:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #0a3c42 as the background.

Brands using this color

Fonts for this mood

#0a3c42 reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #0a3c42
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 #0a3c42 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/0a3c42-a2b8be-df4e86-1f262d-e9f1ee?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