Color

#1b1d31

#1b1d31
hex#1b1d31
rgbrgb(27, 29, 49)
hslhsl(235, 29%, 15%)
oklchoklch(0.239 0.038 278.7)
Closest name: Eclipse Elixir (#1f2133)Relative luminance 0.0133

Tints & shades

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

Harmonies

Complementary

Open in tool →

#312f1b

#1b2831 · #241b31

#311b1d · #1d311b

Split-complementary

Open in tool →

#31241b · #28311b

#311b28 · #312f1b · #1b3124

Contrast

#1b1d31 as textRatioAAAA largeAAAFix
Aaon white
16.58:1passpasspassPasses AAA — no fix needed.
Aaon black
1.27:1failfailfail
  • AA: use #6b71ae as the text (4.6:1)
  • AAA: use #8f93c1 as the text (7.11:1)
  • AA: or shift the background to #878787 (4.61:1)
  • AAA: or shift the background to #ababab (7.22:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #1b1d31 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

#1b1d31 reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #1b1d31
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 #1b1d31 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1b1d31-9e9cc4-df8d4e-241f2d-e9eef1?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