Design language comparison
Luma vs PostHog
Both Luma and PostHog commit to a light-canvas approach, and they pair different display families (__graphik_7126cf vs Open Runde). Beyond surface, motion levels are both expressive.
Palette · side by side
Up to 8 dominant swatches eachSide A · light
Luma
Full Page
#000000
foreground
#ffffff
background
#737373
foreground
#8c8c8c
foreground
#a6a6a6
foreground
#cccccc
foreground
Side B · light
PostHog
Full Page
#4d4f46
foreground
#000000
foreground
#374151
foreground
#9ea096
neutral
#111827
foreground
#65675e
foreground
#f7a501
accent
#bfc1b7
neutral
Typography · side by side
Primary family + weight ladder + sampleSide A · light
Luma
Full Page
- Display
- __graphik_7126cf
- Body
- __graphik_7126cf
- Weights
- 400 · 500 · 600 · 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
PostHog
Full Page
- Display
- Open Runde
- Body
- IBM Plex Sans Variable
- Mono
- ui-monospace
- Weights
- 400 · 500 · 600 · 700 · 800
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
Luma
Full Page
- Base unit
- 4 px
- Container max
- 1280 px
Side B · light
PostHog
Full Page
- Base unit
- 4 px
- Container max
- 320 px
Motion vocabulary · side by side
Level + durations + easingsSide A · light
Luma
Full Page
- Level
- expressive
- Libraries
- —
Durations
Easings
Side B · light
PostHog
Full Page
- Level
- expressive
- Libraries
- —
Durations
Easings
Palette & spacing overlap
Their palettes share 10% of swatches at the dominant tier — a quiet signal both teams drew from the same neutral library before applying brand accents. Their spacing scales overlap by 67% (6, 8, 10, 12, 14 px shared) — a rhythm any agent can transfer between the two systems with minimal recalibration.
Shared swatches (2)
Curator verdict
If you are building an interface that needs to reference both, Luma's restraint reads as the safer default and PostHog's rhythm provides the accent moments — pair them at section-level, not at component-level.