Substack vs Claude.ai
59 token-level differences between these two design systems.
Background
#ffffff → #f8f8f6 Text
#363737 → #121212 Brand
#ff6719 → #cd6f47 Border
rgba(0, 0, 0, 0.10) → rgba(18,18,18,0.12) Display font
Cahuenga → Anthropic Serif Body size
19px → 17px colors 53 changed
~
bg #ffffff → #f8f8f6 ~
bg-soft #f6f6f3 → #faf9f5 ~
surface-warm #fafaf7 → #f3f0ea ~
text #363737 → #121212 ~
text-strong #1a1a1a → #000000 ~
text-faint #a8a8a8 → #b4b4a8 ~
text-muted #878787 → #666660 ~
brand #ff6719 → #cd6f47 ~
brand-deep #cc4a0e → #7d3c1f ~
border rgba(0, 0, 0, 0.10) → rgba(18,18,18,0.12) ~
border-strong rgba(0, 0, 0, 0.20) → rgba(18,18,18,0.18) ~
border-soft rgba(0, 0, 0, 0.06) → rgba(18,18,18,0.06) ~
success #0d8050 → #5a8c5a ~
warning #d97706 → #b58a3c ~
danger #dc2626 → #b54a3c ~
info #2563eb → #5a708c +
bg-deep #f0efea +
surface-soft #fbfaf6 +
text-subtle #8e8e85 +
text-on-brand #ffffff +
text-on-cta #f8f8f6 +
text-on-dark #f3f0ea +
brand-soft #f3e7df +
brand-paler #fdf0e8 +
brand-strong #a85530 +
cta-bg #121212 +
cta-text #f8f8f6 +
cta-hover #2a2a2a +
cta-active #3d3d3d +
link #121212 +
link-hover #cd6f47 +
link-visited #7d3c1f +
scrim rgba(18,18,18,0.45) +
shadow-warm rgba(18,18,18,0.04) +
shadow-card rgba(18,18,18,0.06) +
shadow-elev rgba(18,18,18,0.10) +
shadow-modal rgba(18,18,18,0.18) +
success-soft #e6efe2 +
warning-soft #fbf3df +
danger-soft #fbe8e3 +
highlight #fbe8d6 −
bg-elev #fafaf7 −
bg-cream #fbf9f4 −
text-soft #666c70 −
text-link #363737 −
brand-hover #e85412 −
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) −
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":"Anthropic Serif","size":56} ~
h1 {"family":"Cahuenga","size":40} → {"family":"Anthropic Serif","size":48} ~
h2 {"family":"Cahuenga","size":32} → {"family":"Anthropic Serif","size":40} ~
body {"family":"Spectral","size":19} → {"family":"Anthropic Sans","size":17} ~
label {"family":"Monaco","size":13} → {"family":"Anthropic Mono","size":12} radius 1 changed
~
button 6px → 8px spacing identical
No differences.