Color

#0a3c43

#0a3c43
hex#0a3c43
rgbrgb(10, 60, 67)
hslhsl(187, 74%, 15%)
oklchoklch(0.328 0.051 209)
Closest name: Royal Neptune (#1c3b42)Relative luminance 0.037

Tints & shades

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

Harmonies

Complementary

Open in tool →

#43110a

#0a432d · #0a2043

#430a3c · #3c430a

Split-complementary

Open in tool →

#430a20 · #432d0a

#2d0a43 · #43110a · #20430a

Contrast

#0a3c43 as textRatioAAAA largeAAAFix
Aaon white
12.07:1passpasspassPasses AAA — no fix needed.
Aaon black
1.74:1failfailfail
  • AA: use #15808e as the text (4.51:1)
  • AAA: use #1ba4b6 as the text (7.03:1)
  • AA: or shift the background to #9e9e9e (4.5:1)
  • AAA: or shift the background to #c7c7c7 (7.14:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #0a3c43 as the background.

Brands using this color

Fonts for this mood

#0a3c43 reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #0a3c43
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 #0a3c43 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/0a3c43-a2b8be-df4e83-1f262d-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