Substack vs Signal
61 token-level differences between these two design systems.
Background
#ffffff → #ffffff Text
#363737 → #1c1f23 Brand
#ff6719 → #3a76f0 Border
rgba(0, 0, 0, 0.10) → #e0e3e8 Display font
Cahuenga → Inter Body size
19px → 16px colors 55 changed
~
bg-cream #fbf9f4 → #fef9e9 ~
text #363737 → #1c1f23 ~
text-strong #1a1a1a → #0a0d11 ~
text-soft #666c70 → #7a7f87 ~
text-muted #878787 → #5b6068 ~
text-link #363737 → #2e62d8 ~
brand #ff6719 → #3a76f0 ~
brand-hover #e85412 → #2e62d8 ~
brand-deep #cc4a0e → #234fb8 ~
border rgba(0, 0, 0, 0.10) → #e0e3e8 ~
border-strong rgba(0, 0, 0, 0.20) → #bcc0c7 ~
border-soft rgba(0, 0, 0, 0.06) → #eef0f2 ~
success #0d8050 → #3eaa6c ~
warning #d97706 → #e69138 ~
danger #dc2626 → #d04a3c ~
info #2563eb → #3a76f0 +
bg-warm #f8f9fa +
bg-muted #f1f3f5 +
bg-promo #e8efff +
surface-elevated #ffffff +
surface-hover #f8f9fa +
surface-soft #f4f7ff +
surface-strong #e8eaee +
text-disabled #a8acb3 +
text-on-brand #ffffff +
text-link-hover #1f4ab2 +
brand-active #234fb8 +
brand-soft #e8efff +
donate-blue #2c6bed +
accent-cyan #5fb3f9 +
accent-yellow #f1c40f +
accent-orange #e69138 +
accent-red #d04a3c +
accent-green #3eaa6c +
border-focus #3a76f0 +
encryption-verified #3eaa6c +
encryption-unverified #7a7f87 +
shadow-card rgba(28,31,35,0.06) +
shadow-modal rgba(28,31,35,0.20) +
shadow-popover rgba(28,31,35,0.12) +
success-soft #e0f3e7 +
warning-soft #fdf3e8 +
danger-soft #fbeae6 +
info-soft #e8efff −
bg-elev #fafaf7 −
bg-soft #f6f6f3 −
surface-warm #fafaf7 −
text-faint #a8a8a8 −
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
~
display {"family":"Cahuenga","size":56} → {"family":"Inter","size":56} ~
h1 {"family":"Cahuenga","size":40} → {"family":"Inter","size":40} ~
h2 {"family":"Cahuenga","size":32} → {"family":"Inter","size":32} ~
body {"family":"Spectral","size":19} → {"family":"Inter","size":16} ~
label {"family":"Monaco","size":13} → {"family":"Roboto Mono","size":11} radius 1 changed
~
card 12px → 8px spacing identical
No differences.