Substack vs Character.AI
74 token-level differences between these two design systems.
Background
#ffffff → #f4f4f5 Text
#363737 → #26272b Brand
#ff6719 → #9b6cff Border
rgba(0, 0, 0, 0.10) → rgba(38, 39, 43, 0.12) Display font
Cahuenga → atHauss Body size
19px → 16px colors 61 changed
~
bg #ffffff → #f4f4f5 ~
bg-soft #f6f6f3 → #fafafa ~
text #363737 → #26272b ~
text-strong #1a1a1a → #0f0f12 ~
text-soft #666c70 → #8a8b8f ~
text-faint #a8a8a8 → #a1a1a6 ~
text-muted #878787 → #6b6c70 ~
brand #ff6719 → #9b6cff ~
brand-deep #cc4a0e → #5a2ee0 ~
on-brand #ffffff → #fafafa ~
border rgba(0, 0, 0, 0.10) → rgba(38, 39, 43, 0.12) ~
border-strong rgba(0, 0, 0, 0.20) → rgba(38, 39, 43, 0.20) ~
border-soft rgba(0, 0, 0, 0.06) → rgba(38, 39, 43, 0.06) +
bg-elevated #ffffff +
surface-hover #f8f8f9 +
surface-strong #e4e4e7 +
text-medium #3f3f46 +
on-cta #fafafa +
brand-strong #7e4cff +
brand-soft #ede4ff +
brand-faint #f7f2ff +
brand-glow rgba(155, 108, 255, 0.32) +
cta-bg #202024 +
cta-bg-strong #0f0f12 +
cta-text #fafafa +
social-bg #131316 +
social-bg-hover #202024 +
social-text #fafafa +
link #202024 +
link-hover #9b6cff +
selected-bg #ede4ff +
disabled-bg #e4e4e7 +
disabled-text #a1a1a6 +
border-focus #9b6cff +
border-focus-cta #202024 +
success-bg #dcfce7 +
success-text #15803d +
warning-bg #fef3c7 +
warning-text #854d0e +
danger-bg #fee2e2 +
danger-text #b91c1c +
info-bg #ede4ff +
info-text #5a2ee0 +
shadow-rgb 38, 39, 43 +
shadow-glow 155, 108, 255 −
bg-elev #fafaf7 −
bg-cream #fbf9f4 −
surface-warm #fafaf7 −
text-link #363737 −
brand-hover #e85412 −
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) −
success #0d8050 −
warning #d97706 −
danger #dc2626 −
info #2563eb −
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":"atHauss","size":64} ~
h1 {"family":"Cahuenga","size":40} → {"family":"atHauss","size":36} ~
h2 {"family":"Cahuenga","size":32} → {"family":"atHauss","size":28} ~
body {"family":"Spectral","size":19} → {"family":"atHauss","size":16} ~
label {"family":"Monaco","size":13} → {"family":"JetBrains Mono","size":12} radius 3 changed
~
button 6px → 12px ~
card 12px → 16px ~
pill 9999px → 30px spacing 5 changed
~
xs 4px → 1px ~
sm 8px → 2px ~
md 16px → 6px ~
lg 32px → 16px ~
xl 48px → 24px