Color

#1d5b8b

#1d5b8b
hex#1d5b8b
rgbrgb(29, 91, 139)
hslhsl(206, 65%, 33%)
oklchoklch(0.456 0.1 246.2)
Closest name: Beyond the Sea (#005784)Relative luminance 0.0961

Tints & shades

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

Harmonies

Complementary

Open in tool →

#8b4d1d

#1d8b84 · #1d258b

#8b1d5b · #5b8b1d

Split-complementary

Open in tool →

#8b1d25 · #8b841d

#841d8b · #8b4d1d · #258b1d

Contrast

#1d5b8b as textRatioAAAA largeAAAFix
Aaon white
7.19:1passpasspassPasses AAA — no fix needed.
Aaon black
2.92:1failfailfail
  • AA: use #277ab9 as the text (4.57:1)
  • AAA: use #4e9dda as the text (7.16:1)
  • AA: or shift the background to #cfcfcf (4.61:1)
  • AAA: or shift the background to #fcfcfc (7.01:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #1d5b8b 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

#1d5b8b reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #1d5b8b
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 #1d5b8b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1d5b8b-9caec4-df4e56-1f212d-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