Square vs Substack
58 token-level differences between these two design systems.
Background
#ffffff → #ffffff Text
#000000 → #363737 Brand
#000000 → #ff6719 Border
#d8d8d8 → rgba(0, 0, 0, 0.10) Display font
Square Sans Display → Cahuenga Body size
16px → 19px colors 51 changed
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bg-cream #f1eee9 → #fbf9f4 ~
text #000000 → #363737 ~
text-muted #5a5a5a → #878787 ~
brand #000000 → #ff6719 ~
brand-hover #1c1c1c → #e85412 ~
border #d8d8d8 → rgba(0, 0, 0, 0.10) ~
border-strong #a0a0a0 → rgba(0, 0, 0, 0.20) ~
border-soft #ebebeb → rgba(0, 0, 0, 0.06) ~
shadow-soft rgba(0, 0, 0, 0.08) → rgba(0, 0, 0, 0.06) +
bg-elev #fafaf7 +
bg-soft #f6f6f3 +
surface-warm #fafaf7 +
text-strong #1a1a1a +
text-soft #666c70 +
text-faint #a8a8a8 +
text-link #363737 +
brand-deep #cc4a0e +
brand-tint rgba(255, 103, 25, 0.10) +
brand-tint-strong rgba(255, 103, 25, 0.18) +
border-warm rgba(0, 0, 0, 0.08) +
selection-bg rgba(255, 103, 25, 0.20) +
success #0d8050 +
warning #d97706 +
danger #dc2626 +
info #2563eb +
shadow-medium rgba(0, 0, 0, 0.10) +
reading-rule rgba(0, 0, 0, 0.08) −
bg-dark #000000 −
bg-cool #f7f7f7 −
surface-soft #f7f7f7 −
surface-strong #ebebeb −
surface-dark-elevated #1c1c1c −
surface-cream #f1eee9 −
text-body #1c1c1c −
text-subtle #8a8a8a −
text-on-dark #ffffff −
text-on-dark-soft #a0a0a0 −
accent #006aff −
accent-hover #0050c8 −
accent-soft #e6efff −
on-accent #ffffff −
link #006aff −
link-hover #0050c8 −
border-on-dark rgba(255,255,255,0.16) −
semantic-success #1f8b4c −
semantic-warning #cc7700 −
semantic-danger #cf202f −
semantic-info #006aff −
focus-ring rgba(0,106,255,0.45) −
shadow-ambient rgba(0, 0, 0, 0.04) −
shadow-hard rgba(0, 0, 0, 0.16) typography 5 changed
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display {"family":"Square Sans Display","size":80} → {"family":"Cahuenga","size":56} ~
h1 {"family":"Square Sans Display","size":40} → {"family":"Cahuenga","size":40} ~
h2 {"family":"Square Sans Display","size":32} → {"family":"Cahuenga","size":32} ~
body {"family":"Square Sans Text","size":16} → {"family":"Spectral","size":19} ~
label {"family":"Square Sans Mono","size":11} → {"family":"Monaco","size":13} radius 1 changed
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button 8px → 6px spacing 1 changed
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xl 64px → 48px