Substack vs WHOOP
56 token-level differences between these two design systems.
Background
#ffffff → #000000 Text
#363737 → #ffffff Brand
#ff6719 → #a0d10b Border
rgba(0, 0, 0, 0.10) → #1f1f1f Display font
Cahuenga → Inter Body size
19px → 16px colors 50 changed
~
bg #ffffff → #000000 ~
bg-elev #fafaf7 → #0a0a0a ~
surface #ffffff → #0a0a0a ~
text #363737 → #ffffff ~
text-strong #1a1a1a → #ffffff ~
text-soft #666c70 → #8a8a8a ~
text-faint #a8a8a8 → #5e5e5e ~
text-muted #878787 → #b5b5b5 ~
brand #ff6719 → #a0d10b ~
brand-hover #e85412 → #88b609 ~
brand-deep #cc4a0e → #476005 ~
border rgba(0, 0, 0, 0.10) → #1f1f1f ~
border-strong rgba(0, 0, 0, 0.20) → #2e2e2e ~
border-soft rgba(0, 0, 0, 0.06) → #141414 ~
success #0d8050 → #16ec06 ~
warning #d97706 → #ffde00 ~
danger #dc2626 → #ff0026 ~
info #2563eb → #0093e7 +
bg-elev-strong #141414 +
bg-light #ffffff +
surface-soft #141414 +
surface-strong #1f1f1f +
brand-active #739707 +
brand-pale #e8f3c6 +
brand-soft #0c1102 +
text-on-brand #000000 +
link #ffffff +
link-hover #a0d10b +
border-input #3d3d3d +
recovery-green #16ec06 +
recovery-yellow #ffde00 +
recovery-red #ff0026 +
strain-blue #0093e7 +
sleep-blue #7eb8d9 +
hrv-purple #9c7ed9 +
scrim rgba(0,0,0,0.85) +
shadow-card rgba(0,0,0,0.6) +
shadow-elev rgba(0,0,0,0.8) −
bg-cream #fbf9f4 −
bg-soft #f6f6f3 −
surface-warm #fafaf7 −
text-link #363737 −
brand-tint rgba(255, 103, 25, 0.10) −
brand-tint-strong rgba(255, 103, 25, 0.18) −
on-brand #ffffff −
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":72} ~
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":"Inter","size":11} radius 1 changed
~
button 6px → 8px spacing identical
No differences.