Design Index

loc.gov

Measured in a real browser on 4 November 2026. For reference and benchmarking.

Colours

primary#0076ad
neutral#121212
neutral#ffffff
neutral#000000
neutral#efefef
neutral#808080
neutral#323232

Fonts

  • Open Sans
  • Roboto Slab
  • Helvetica

Type scale

60px
55px
36px
32px
20px
18px
16px
14px
11px
10px

Corners

1px
4px
50px

Spacing and depth

Spacing base: 2px

Distinct shadows: 1

Text and background pairs below WCAG AA: 0

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