Color

#143c99

#143c99
hex#143c99
rgbrgb(20, 60, 153)
hslhsl(222, 77%, 34%)
oklchoklch(0.393 0.159 263.3)
Closest name: Depths of Night (#2c319b)Relative luminance 0.0568

Colors that go with #143c99

Charcoal, Steel Blue and 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 →

#997114

#147f99 · #2f1499

#99143c · #3c9914

Split-complementary

Open in tool →

#992f14 · #7f9914

#99147f · #997114 · #14992f

Contrast

#143c99 as textRatioAAAA largeAAAFix
Aaon white
9.83:1passpasspassPasses AAA — no fix needed.
Aaon black
2.14:1failfailfail
  • AA: use #3d70e6 as the text (4.66:1)
  • AAA: use #6f94ec as the text (7.12:1)
  • AA: or shift the background to #b0b0b0 (4.53:1)
  • AAA: or shift the background to #dbdbdb (7.1:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #143c99 as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#143c99 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #143c99
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 #143c99 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/143c99-9ca3c4-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