Character.AI vs Substack
74 token-level differences between these two design systems.
Background
#f4f4f5 → #ffffff Text
#26272b → #363737 Brand
#9b6cff → #ff6719 Border
rgba(38, 39, 43, 0.12) → rgba(0, 0, 0, 0.10) Display font
atHauss → Cahuenga Body size
16px → 19px colors 61 changed
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bg #f4f4f5 → #ffffff ~
bg-soft #fafafa → #f6f6f3 ~
text #26272b → #363737 ~
text-strong #0f0f12 → #1a1a1a ~
text-muted #6b6c70 → #878787 ~
text-soft #8a8b8f → #666c70 ~
text-faint #a1a1a6 → #a8a8a8 ~
on-brand #fafafa → #ffffff ~
brand #9b6cff → #ff6719 ~
brand-deep #5a2ee0 → #cc4a0e ~
border rgba(38, 39, 43, 0.12) → rgba(0, 0, 0, 0.10) ~
border-strong rgba(38, 39, 43, 0.20) → rgba(0, 0, 0, 0.20) ~
border-soft rgba(38, 39, 43, 0.06) → rgba(0, 0, 0, 0.06) +
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) −
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 typography 5 changed
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display {"family":"atHauss","size":64} → {"family":"Cahuenga","size":56} ~
h1 {"family":"atHauss","size":36} → {"family":"Cahuenga","size":40} ~
h2 {"family":"atHauss","size":28} → {"family":"Cahuenga","size":32} ~
body {"family":"atHauss","size":16} → {"family":"Spectral","size":19} ~
label {"family":"JetBrains Mono","size":12} → {"family":"Monaco","size":13} radius 3 changed
~
button 12px → 6px ~
card 16px → 12px ~
pill 30px → 9999px spacing 5 changed
~
xs 1px → 4px ~
sm 2px → 8px ~
md 6px → 16px ~
lg 16px → 32px ~
xl 24px → 48px