Color

#2b3340

#2b3340
hex#2b3340
rgbrgb(43, 51, 64)
hslhsl(217, 20%, 21%)
oklchoklch(0.319 0.026 260.1)
Closest name: Blue Whale (#1e3442)Relative luminance 0.0325

Tints & shades

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

Harmonies

Complementary

Open in tool →

#40382b

#2b3e40 · #2d2b40

#402b33 · #33402b

Split-complementary

Open in tool →

#402d2b · #3e402b

#402b3e · #40382b · #2b402d

Contrast

#2b3340 as textRatioAAAA largeAAAFix
Aaon white
12.73:1passpasspassPasses AAA — no fix needed.
Aaon black
1.65:1failfailfail
  • AA: use #647796 as the text (4.62:1)
  • AAA: use #8897af as the text (7.09:1)
  • AA: or shift the background to #9c9c9c (4.63:1)
  • AAA: or shift the background to #c2c2c2 (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 #2b3340 as the background.

Brands using this color

Fonts for this mood

#2b3340 reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #2b3340
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 #2b3340 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/2b3340-9ca7c4-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