Color

#1b2798

#1b2798
hex#1b2798
rgbrgb(27, 39, 152)
hslhsl(234, 70%, 35%)
oklchoklch(0.356 0.18 268.9)
Closest name: Deepsea Kraken (#082599)Relative luminance 0.0395

Tints & shades

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

Harmonies

Complementary

Open in tool →

#988b1b

#1b6698 · #4d1b98

#981b27 · #27981b

Split-complementary

Open in tool →

#984d1b · #66981b

#981b66 · #988b1b · #1b984d

Contrast

#1b2798 as textRatioAAAA largeAAAFix
Aaon white
11.73:1passpasspassPasses AAA — no fix needed.
Aaon black
1.79:1failfailfail
  • AA: use #5a68e2 as the text (4.51:1)
  • AAA: use #8690ea as the text (7.19:1)
  • AA: or shift the background to #a1a1a1 (4.54:1)
  • AAA: or shift the background to #c9c9c9 (7.08:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #1b2798 as the background.

Brands using this color

Fonts for this mood

#1b2798 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #1b2798
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 #1b2798 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1b2798-9d9cc4-df8a4e-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