Color

#04051b

#04051b
hex#04051b
rgbrgb(4, 5, 27)
hslhsl(237, 74%, 6%)
oklchoklch(0.132 0.049 274.5)
Closest name: Obsidian Shard (#060313)Relative luminance 0.0021

Tints & shades

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

Harmonies

Complementary

Open in tool →

#1b1904

#04101b · #0e041b

#1b0405 · #051b04

Split-complementary

Open in tool →

#1b0e04 · #101b04

#1b0410 · #1b1904 · #041b0e

Contrast

#04051b as textRatioAAAA largeAAAFix
Aaon white
20.14:1passpasspassPasses AAA — no fix needed.
Aaon black
1.04:1failfailfail
  • AA: use #5f66e7 as the text (4.54:1)
  • AAA: use #878ced as the text (7:1)
  • AA: or shift the background to #787878 (4.56:1)
  • AAA: or shift the background to #999999 (7.07:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #04051b 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

#04051b reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #04051b
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 #04051b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/04051b-9f9cc4-df924e-251f2d-e9edf1?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