Design language comparison
Arc vs Comet
Arc runs a light-canvas system while Comet chose dark, and they pair different display families (Marlin vs system-ui). Beyond surface, motion divides them — Arc is subtle, Comet is expressive.
Palette · side by side
Up to 8 dominant swatches eachSide A · light
Arc
Full Page
#3139fb
brand
#000000
foreground
#fffcec
background
#ffffff
background
#696969
foreground
#210784
accent
#ff9999
accent
Side B · dark
Comet
Full Page
#313131
foreground
#0000ee
brand
#d9d9d9
neutral
Typography · side by side
Primary family + weight ladder + sampleSide A · light
Arc
Full Page
- Display
- Marlin Soft SQ
- Body
- Marlin
- Mono
- ABC Favorit Mono
- Weights
- 500 · 700
Sample
The quick brown fox jumps over the lazy dog.
1234567890 — Body sample renders in the captured family if your browser has it; otherwise system fallback signals the weight ladder.
Side B · dark
Comet
Full Page
- Display
- system-ui
- Body
- monospace
- Mono
- monospace
- Weights
- 400 · 600
Sample
The quick brown fox jumps over the lazy dog.
1234567890 — Body sample renders in the captured family if your browser has it; otherwise system fallback signals the weight ladder.
Spacing scale · side by side
Base unit + first 8 scale valuesSide A · light
Arc
Full Page
- Base unit
- 4 px
- Container max
- 1440 px
Side B · dark
Comet
Full Page
- Base unit
- 8 px
- Container max
- 960 px
Motion vocabulary · side by side
Level + durations + easingsSide A · light
Arc
Full Page
- Level
- subtle
- Libraries
- —
Durations
Easings
Side B · dark
Comet
Full Page
- Level
- expressive
- Libraries
- —
Durations
Easings
Palette & spacing overlap
Palette overlap is zero — Arc and Comet live in completely different chromatic registers, even when their layout grids feel adjacent. Their spacing scales overlap by 33% (8, 16, 32, 128 px shared) — a rhythm any agent can transfer between the two systems with minimal recalibration.
Curator verdict
Pick a side. Mixing Arc's light-first canvas with Comet's expressive motion vocabulary produces visual whiplash. Adopt one system as your primary, study the other for individual technique transfers (e.g. Arc's spacing, Comet's shadow).