Substack vs xAI
63 token-level differences between these two design systems.
Background
#ffffff → #ffffff Text
#363737 → #0a0a0a Brand
#ff6719 → #0a0a0a Border
rgba(0, 0, 0, 0.10) → #d5d9e2 Display font
Cahuenga → Universal Sans Display Body size
19px → 16px colors 53 changed
~
bg-soft #f6f6f3 → #fafafa ~
surface #ffffff → #f9f8f6 ~
text #363737 → #0a0a0a ~
text-strong #1a1a1a → #0a0a0a ~
text-muted #878787 → #6b7280 ~
brand #ff6719 → #0a0a0a ~
brand-hover #e85412 → #1f1f1f ~
on-brand #ffffff → #0a0a0a ~
border rgba(0, 0, 0, 0.10) → #d5d9e2 ~
border-strong rgba(0, 0, 0, 0.20) → rgba(10,10,10,0.16) ~
border-soft rgba(0, 0, 0, 0.06) → rgba(10,10,10,0.08) ~
success #0d8050 → #248430 ~
warning #d97706 → #b45309 ~
danger #dc2626 → #be2e31 ~
info #2563eb → #3b82f6 +
surface-terminal #f8f7f5 +
surface-card #fffffff2 +
surface-hover rgba(10,10,10,0.04) +
surface-press rgba(10,10,10,0.08) +
header-bg rgba(255,255,255,0.85) +
text-terminal #262626 +
text-subtle #8a8f98 +
text-on-brand #ffffff +
brand-active #2c2c2c +
link #111827 +
link-hover #0a0a0a +
link-visited #111827 +
ring #3b82f6 +
scrim rgba(10,10,10,0.5) +
shadow-color rgba(0,0,0,0.10) +
terminal-fg #262626 +
terminal-green #248430 +
terminal-green-bg #e3efe4 +
terminal-red #be2e31 +
terminal-red-bg #f8eaea +
success-bg #ecfdf3 +
info-bg #f0f8ff +
warning-bg #fffcf0 +
danger-bg #fff0f0 −
bg-elev #fafaf7 −
bg-cream #fbf9f4 −
surface-warm #fafaf7 −
text-soft #666c70 −
text-faint #a8a8a8 −
text-link #363737 −
brand-deep #cc4a0e −
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) −
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":"Universal Sans Display","size":80} ~
h1 {"family":"Cahuenga","size":40} → {"family":"Universal Sans Display","size":60} ~
h2 {"family":"Cahuenga","size":32} → {"family":"Universal Sans Display","size":48} ~
body {"family":"Spectral","size":19} → {"family":"Universal Sans","size":16} ~
label {"family":"Monaco","size":13} → {"family":"SFMono-Regular","size":13} radius 1 changed
~
button 6px → 8px spacing 4 changed
~
xs 4px → 0px ~
sm 8px → 4px ~
md 16px → 12px ~
xl 48px → 64px