Color

#263f4b

#263f4b
hex#263f4b
rgbrgb(38, 63, 75)
hslhsl(199, 33%, 22%)
oklchoklch(0.353 0.037 229.9)
Closest name: Cold and Dark (#154250)Relative luminance 0.0448

Tints & shades

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

Harmonies

Complementary

Open in tool →

#4b3126

#264b44 · #262c4b

#4b263f · #3f4b26

Split-complementary

Open in tool →

#4b262c · #4b4426

#44264b · #4b3126 · #2c4b26

Contrast

#263f4b as textRatioAAAA largeAAAFix
Aaon white
11.08:1passpasspassPasses AAA — no fix needed.
Aaon black
1.9:1failfailfail
  • AA: use #497b92 as the text (4.53:1)
  • AAA: use #6a9cb4 as the text (7.03:1)
  • AA: or shift the background to #a6a6a6 (4.55:1)
  • AAA: or shift the background to #cfcfcf (7.11:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #263f4b as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

Fonts for this mood

#263f4b reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #263f4b
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 #263f4b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/263f4b-9cb3c4-df4e66-1f232d-e9f1f0?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