Color

#1b1e31

#1b1e31
hex#1b1e31
rgbrgb(27, 30, 49)
hslhsl(232, 29%, 15%)
oklchoklch(0.242 0.037 276.4)
Closest name: Eclipse Elixir (#1f2133)Relative luminance 0.0138

Tints & shades

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

Harmonies

Complementary

Open in tool →

#312e1b

#1b2931 · #231b31

#311b1e · #1e311b

Split-complementary

Open in tool →

#31231b · #29311b

#311b29 · #312e1b · #1b3123

Contrast

#1b1e31 as textRatioAAAA largeAAAFix
Aaon white
16.45:1passpasspassPasses AAA — no fix needed.
Aaon black
1.28:1failfailfail
  • AA: use #6871ac as the text (4.55:1)
  • AAA: use #8c93c0 as the text (7.05:1)
  • AA: or shift the background to #878787 (4.58:1)
  • AAA: or shift the background to #ababab (7.16:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #1b1e31 as the background.

Brands using this color

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

Palettes built around it

Fonts for this mood

#1b1e31 reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #1b1e31
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 #1b1e31 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1b1e31-9c9dc4-df864e-231f2d-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