Design language comparison
Arc vs xAI
Both Arc and xAI commit to a light-canvas approach, and they pair different display families (Marlin vs -apple-system). Beyond surface, motion levels are both subtle.
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 · light
xAI
Full Page
#404040
foreground
#595959
foreground
#0051c3
brand
#000000
foreground
#ffffff
background
#ebebeb
background
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 · light
xAI
Full Page
- Display
- -apple-system
- Body
- Times New Roman
- Weights
- 300 · 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 · light
xAI
Full Page
- Base unit
- 4 px
- Container max
- 1536 px
Motion vocabulary · side by side
Level + durations + easingsSide A · light
Arc
Full Page
- Level
- subtle
- Libraries
- —
Durations
Easings
Side B · light
xAI
Full Page
- Level
- subtle
- Libraries
- —
Durations
Easings
Palette & spacing overlap
Their palettes share 29% of swatches at the dominant tier — a quiet signal both teams drew from the same neutral library before applying brand accents. Spacing scales diverge entirely — agents porting components from one to the other should expect to re-derive the ladder, not interpolate.
Shared swatches (2)
Curator verdict
If you are building an interface that needs to reference both, Arc's restraint reads as the safer default and xAI's rhythm provides the accent moments — pair them at section-level, not at component-level.