Substack vs shadcn/ui
57 token-level differences between these two design systems.
Background
#ffffff → #ffffff Text
#363737 → #0a0a0a Brand
#ff6719 → #0a0a0a Border
rgba(0, 0, 0, 0.10) → #e4e4e7 Display font
Cahuenga → Geist Body size
19px → 16px colors 51 changed
~
surface #ffffff → #fafafa ~
text #363737 → #0a0a0a ~
text-strong #1a1a1a → #000000 ~
text-faint #a8a8a8 → #a1a1aa ~
text-muted #878787 → #71717a ~
brand #ff6719 → #0a0a0a ~
brand-hover #e85412 → #1a1a1a ~
on-brand #ffffff → #fafafa ~
border rgba(0, 0, 0, 0.10) → #e4e4e7 ~
border-strong rgba(0, 0, 0, 0.20) → #d4d4d8 ~
border-soft rgba(0, 0, 0, 0.06) → #f4f4f5 ~
selection-bg rgba(255, 103, 25, 0.20) → rgba(10, 10, 10, 0.1) ~
success #0d8050 → #10b981 ~
warning #d97706 → #f59e0b ~
info #2563eb → #3b82f6 +
surface-strong #f4f4f5 +
surface-muted #f4f4f5 +
surface-accent #f4f4f5 +
surface-elevated #ffffff +
text-secondary #3f3f46 +
brand-active #27272a +
link #0a0a0a +
link-hover #3f3f46 +
destructive #ef4444 +
destructive-hover #dc2626 +
destructive-foreground #fafafa +
input #e4e4e7 +
input-border #e4e4e7 +
ring #0a0a0a +
shadow-color rgba(0, 0, 0, 0.05) +
shadow-color-md rgba(0, 0, 0, 0.1) +
shadow-color-lg rgba(0, 0, 0, 0.15) +
chart-1 #e76e50 +
chart-2 #2a9d90 +
chart-3 #274754 +
chart-4 #e8c468 +
chart-5 #f4a462 −
bg-elev #fafaf7 −
bg-cream #fbf9f4 −
bg-soft #f6f6f3 −
surface-warm #fafaf7 −
text-soft #666c70 −
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) −
danger #dc2626 −
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
~
display {"family":"Cahuenga","size":56} → {"family":"Geist","size":56} ~
h1 {"family":"Cahuenga","size":40} → {"family":"Geist","size":40} ~
h2 {"family":"Cahuenga","size":32} → {"family":"Geist","size":32} ~
body {"family":"Spectral","size":19} → {"family":"Geist","size":16} ~
label {"family":"Monaco","size":13} → {"family":"Geist Mono","size":14} radius 1 changed
~
button 6px → 8px spacing identical
No differences.