Substack vs Cal.com
59 token-level differences between these two design systems.
Background
#ffffff → #f4f4f4 Text
#363737 → #111111 Brand
#ff6719 → #111111 Border
rgba(0, 0, 0, 0.10) → rgba(0, 0, 0, 0.08) Display font
Cahuenga → Cal Sans Body size
19px → 16px colors 50 changed
~
bg #ffffff → #f4f4f4 ~
bg-soft #f6f6f3 → #fafafa ~
text #363737 → #111111 ~
text-strong #1a1a1a → #000000 ~
text-soft #666c70 → #6b7280 ~
text-faint #a8a8a8 → #9ca3af ~
text-muted #878787 → #898989 ~
brand #ff6719 → #111111 ~
border rgba(0, 0, 0, 0.10) → rgba(0, 0, 0, 0.08) ~
border-strong rgba(0, 0, 0, 0.20) → #e5e7eb ~
border-soft rgba(0, 0, 0, 0.06) → #f3f4f6 +
surface-soft #f8f9fa +
surface-card #f5f5f5 +
surface-strong #e5e7eb +
surface-dark #101010 +
surface-dark-elev #1a1a1a +
text-body #374151 +
brand-active #242424 +
brand-disabled #e5e7eb +
on-dark #ffffff +
on-dark-soft #a1a1aa +
link #0000ee +
link-visited #551a8b +
link-hover #0000aa +
brand-accent #3b82f6 +
badge-orange #fb923c +
badge-pink #ec4899 +
badge-violet #8b5cf6 +
badge-emerald #34d399 +
semantic-success #10b981 +
semantic-warning #f59e0b +
semantic-danger #ef4444 +
semantic-info #3b82f6 −
bg-elev #fafaf7 −
bg-cream #fbf9f4 −
surface-warm #fafaf7 −
text-link #363737 −
brand-hover #e85412 −
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-soft rgba(0, 0, 0, 0.06) −
shadow-medium rgba(0, 0, 0, 0.10) −
reading-rule rgba(0, 0, 0, 0.08) typography 5 changed
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display {"family":"Cahuenga","size":56} → {"family":"Cal Sans","size":64} ~
h1 {"family":"Cahuenga","size":40} → {"family":"Cal Sans","size":36} ~
h2 {"family":"Cahuenga","size":32} → {"family":"Cal Sans","size":28} ~
body {"family":"Spectral","size":19} → {"family":"Inter","size":16} ~
label {"family":"Monaco","size":13} → {"family":"JetBrains Mono","size":11} radius 2 changed
~
button 6px → 8px ~
card 12px → 20px spacing 2 changed
~
lg 32px → 48px ~
xl 48px → 96px