Color

#1b3550

#1b3550
hex#1b3550
rgbrgb(27, 53, 80)
hslhsl(211, 50%, 21%)
oklchoklch(0.322 0.058 250.9)
Closest name: Beyond the Stars (#0a3251)Relative luminance 0.0336

Tints & shades

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

Harmonies

Complementary

Open in tool →

#50361b

#1b4f50 · #1c1b50

#501b35 · #35501b

Split-complementary

Open in tool →

#501c1b · #4f501b

#501b4f · #50361b · #1b501c

Contrast

#1b3550 as textRatioAAAA largeAAAFix
Aaon white
12.56:1passpasspassPasses AAA — no fix needed.
Aaon black
1.67:1failfailfail
  • AA: use #3d78b8 as the text (4.58:1)
  • AAA: use #6a9acd as the text (7.12:1)
  • AA: or shift the background to #9c9c9c (4.58:1)
  • AAA: or shift the background to #c2c2c2 (7.05:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #1b3550 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

#1b3550 reads as cool, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #1b3550
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 #1b3550 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1b3550-9cabc4-df534e-1f202d-e9f1f1?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