Color

#1d283f

#1d283f
hex#1d283f
rgbrgb(29, 40, 63)
hslhsl(221, 37%, 18%)
oklchoklch(0.278 0.045 264.2)
Closest name: Eternal Darkness (#1c2841)Relative luminance 0.0214

Tints & shades

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

Harmonies

Complementary

Open in tool →

#3f341d

#1d393f · #231d3f

#3f1d28 · #283f1d

Split-complementary

Open in tool →

#3f231d · #393f1d

#3f1d39 · #3f341d · #1d3f23

Contrast

#1d283f as textRatioAAAA largeAAAFix
Aaon white
14.71:1passpasspassPasses AAA — no fix needed.
Aaon black
1.43:1failfailfail
  • AA: use #5774b2 as the text (4.55:1)
  • AAA: use #8197c5 as the text (7.17:1)
  • AA: or shift the background to #8f8f8f (4.55:1)
  • AAA: or shift the background to #b3b3b3 (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 #1d283f 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

#1d283f reads as cool, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #1d283f
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 #1d283f and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1d283f-9ca4c4-df6b4e-211f2d-e9eff1?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