Color

#1b006b

#1b006b
hex#1b006b
rgbrgb(27, 0, 107)
hslhsl(255, 100%, 21%)
oklchoklch(0.255 0.157 277.6)
Closest name: Blackmail (#220066)Relative luminance 0.0129

Tints & shades

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

Harmonies

Complementary

Open in tool →

#506b00

#001b6b · #50006b

#6b1b00 · #006b1b

Split-complementary

Open in tool →

#6b5000 · #1b6b00

#6b001b · #506b00 · #006b50

Contrast

#1b006b as textRatioAAAA largeAAAFix
Aaon white
16.68:1passpasspassPasses AAA — no fix needed.
Aaon black
1.26:1failfailfail
  • AA: use #7d52ff as the text (4.52:1)
  • AAA: use #9f80ff as the text (7.01:1)
  • AA: or shift the background to #858585 (4.52:1)
  • AAA: or shift the background to #a8a8a8 (7.02:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #1b006b 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

#1b006b reads as cool, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #1b006b
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 #1b006b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1b006b-ab9cc4-dfbd4e-291f2d-e9ebf1?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