Signal vs Substack
61 token-level differences between these two design systems.
Background
#ffffff → #ffffff Text
#1c1f23 → #363737 Brand
#3a76f0 → #ff6719 Border
#e0e3e8 → rgba(0, 0, 0, 0.10) Display font
Inter → Cahuenga Body size
16px → 19px colors 55 changed
~
bg-cream #fef9e9 → #fbf9f4 ~
text #1c1f23 → #363737 ~
text-strong #0a0d11 → #1a1a1a ~
text-muted #5b6068 → #878787 ~
text-soft #7a7f87 → #666c70 ~
text-link #2e62d8 → #363737 ~
brand #3a76f0 → #ff6719 ~
brand-hover #2e62d8 → #e85412 ~
brand-deep #234fb8 → #cc4a0e ~
border #e0e3e8 → rgba(0, 0, 0, 0.10) ~
border-soft #eef0f2 → rgba(0, 0, 0, 0.06) ~
border-strong #bcc0c7 → rgba(0, 0, 0, 0.20) ~
success #3eaa6c → #0d8050 ~
warning #e69138 → #d97706 ~
danger #d04a3c → #dc2626 ~
info #3a76f0 → #2563eb +
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) −
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 typography 5 changed
~
display {"family":"Inter","size":56} → {"family":"Cahuenga","size":56} ~
h1 {"family":"Inter","size":40} → {"family":"Cahuenga","size":40} ~
h2 {"family":"Inter","size":32} → {"family":"Cahuenga","size":32} ~
body {"family":"Inter","size":16} → {"family":"Spectral","size":19} ~
label {"family":"Roboto Mono","size":11} → {"family":"Monaco","size":13} radius 1 changed
~
card 8px → 12px spacing identical
No differences.