Threads vs Substack
66 token-level differences between these two design systems.
Background
#000000 → #ffffff Text
#ffffff → #363737 Brand
#ffffff → #ff6719 Border
rgba(243,245,247,0.15) → rgba(0, 0, 0, 0.10) Display font
Instagram Sans → Cahuenga Body size
15px → 19px colors 59 changed
~
bg #000000 → #ffffff ~
bg-soft #101010 → #f6f6f3 ~
surface #181818 → #ffffff ~
text #ffffff → #363737 ~
text-strong #ffffff → #1a1a1a ~
text-muted rgba(243,245,247,0.5) → #878787 ~
text-soft rgba(243,245,247,0.4) → #666c70 ~
text-faint rgba(243,245,247,0.3) → #a8a8a8 ~
brand #ffffff → #ff6719 ~
border rgba(243,245,247,0.15) → rgba(0, 0, 0, 0.10) ~
border-strong rgba(243,245,247,0.3) → rgba(0, 0, 0, 0.20) ~
on-brand #000000 → #ffffff ~
success #22c55e → #0d8050 ~
warning #fab421 → #d97706 ~
danger #fe0169 → #dc2626 ~
info #1da1f2 → #2563eb +
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) −
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 typography 5 changed
~
display {"family":"Instagram Sans","size":56} → {"family":"Cahuenga","size":56} ~
h1 {"family":"Instagram Sans","size":40} → {"family":"Cahuenga","size":40} ~
h2 {"family":"Instagram Sans","size":32} → {"family":"Cahuenga","size":32} ~
body {"family":"Instagram Sans","size":15} → {"family":"Spectral","size":19} ~
label {"family":"JetBrains Mono","size":12} → {"family":"Monaco","size":13} radius 2 changed
~
button 12px → 6px ~
card 18px → 12px spacing identical
No differences.