Substack vs Threads
66 token-level differences between these two design systems.
Background
#ffffff → #000000 Text
#363737 → #ffffff Brand
#ff6719 → #ffffff Border
rgba(0, 0, 0, 0.10) → rgba(243,245,247,0.15) Display font
Cahuenga → Instagram Sans Body size
19px → 15px colors 59 changed
~
bg #ffffff → #000000 ~
bg-soft #f6f6f3 → #101010 ~
surface #ffffff → #181818 ~
text #363737 → #ffffff ~
text-strong #1a1a1a → #ffffff ~
text-soft #666c70 → rgba(243,245,247,0.4) ~
text-faint #a8a8a8 → rgba(243,245,247,0.3) ~
text-muted #878787 → rgba(243,245,247,0.5) ~
brand #ff6719 → #ffffff ~
on-brand #ffffff → #000000 ~
border rgba(0, 0, 0, 0.10) → rgba(243,245,247,0.15) ~
border-strong rgba(0, 0, 0, 0.20) → rgba(243,245,247,0.3) ~
success #0d8050 → #22c55e ~
warning #d97706 → #fab421 ~
danger #dc2626 → #fe0169 ~
info #2563eb → #1da1f2 +
bg-light #ffffff +
bg-deep #000000 +
surface-hover #1f1f1f +
surface-elevated #252525 +
surface-soft #0a0a0a +
text-body #f5f5f5 +
text-on-light #000000 +
text-on-light-muted rgba(0,0,0,0.5) +
text-on-brand #ffffff +
primary-action #ffffff +
primary-action-hover #e0e0e0 +
secondary-action #000000 +
link rgba(243,245,247,0.5) +
link-hover #ffffff +
border-subtle rgba(243,245,247,0.08) +
on-bg #ffffff +
shadow-color rgba(0,0,0,0.4) +
reply-icon rgba(243,245,247,0.5) +
reply-active #ffffff +
repost-icon rgba(243,245,247,0.5) +
repost-active #22c55e +
like-icon rgba(243,245,247,0.5) +
like-active #fe0169 +
share-icon rgba(243,245,247,0.5) +
thread-line rgba(243,245,247,0.2) +
follow-button-bg #ffffff +
followed-button-bg transparent +
verified-blue #1da1f2 +
notification-dot #fe0169 −
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-soft rgba(0, 0, 0, 0.06) −
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":"Instagram Sans","size":56} ~
h1 {"family":"Cahuenga","size":40} → {"family":"Instagram Sans","size":40} ~
h2 {"family":"Cahuenga","size":32} → {"family":"Instagram Sans","size":32} ~
body {"family":"Spectral","size":19} → {"family":"Instagram Sans","size":15} ~
label {"family":"Monaco","size":13} → {"family":"JetBrains Mono","size":12} radius 2 changed
~
button 6px → 12px ~
card 12px → 18px spacing identical
No differences.