Color

#1b4098

#1b4098
hex#1b4098
rgbrgb(27, 64, 152)
hslhsl(222, 70%, 35%)
oklchoklch(0.403 0.151 263.7)
Closest name: Cascade Twilight (#234893)Relative luminance 0.0617

Colors that go with #1b4098

Charcoal, Sea Green and Steel Blue lead the list. Each partner is a real named colour with the reason it works — a wheel relationship, a neutral that carries it, or a pairing lifted from a palette or brand system that actually shipped — and every pair opens in the palette tool.

Tints & shades

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

Harmonies

Complementary

Open in tool →

#98721b

#1b7f98 · #341b98

#981b40 · #40981b

Split-complementary

Open in tool →

#98341b · #7f981b

#981b7f · #98721b · #1b9834

Contrast

#1b4098 as textRatioAAAA largeAAAFix
Aaon white
9.4:1passpasspassPasses AAA — no fix needed.
Aaon black
2.23:1failfailfail
  • AA: use #406fdd as the text (4.54:1)
  • AAA: use #7093e6 as the text (7.01:1)
  • AA: or shift the background to #b5b5b5 (4.59:1)
  • AAA: or shift the background to #e0e0e0 (7.12:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #1b4098 as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#1b4098 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #1b4098
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — direct_palette, edit_direction, check_palette, check_contrast — read-only, no key. Every direction it proposes comes with a /colors/d/… link: open it, lock what you like, paste the link back, and the agent edits rather than re-rolls.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #1b4098 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1b4098-9ca3c4-df6e4e-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