Design language comparison
Neon vs Spline
Both Neon and Spline commit to a dark-canvas approach, and they pair different display families (GeistMono vs Spline Sans). Beyond surface, motion levels are both expressive.
Palette · side by side
Up to 8 dominant swatches eachSide A · dark
Neon
Full Page
#ffffff
background
#2c6d4c
brand
#000000
foreground
#94979e
foreground
#797d86
foreground
#c9cbcf
foreground
#afb1b6
foreground
#61646b
neutral
Side B · dark
Spline
Full Page
#ffffff
background
#000000
foreground
#191a1d
foreground
#888888
foreground
#569cd6
accent
#0062ff
accent
#ce9178
accent
#6a9955
foreground
Typography · side by side
Primary family + weight ladder + sampleSide A · dark
Neon
Full Page
- Display
- Inter
- Body
- Inter
- Mono
- GeistMono
- Weights
- 400 · 500
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
Spline
Full Page
- Display
- Spline Sans
- Body
- ui-monospace
- Mono
- ui-monospace
- Weights
- 400 · 500
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 · dark
Neon
Full Page
- Base unit
- 4 px
- Container max
- 1856 px
Side B · dark
Spline
Full Page
- Base unit
- 4 px
- Container max
- 652 px
Motion vocabulary · side by side
Level + durations + easingsSide A · dark
Neon
Full Page
- Level
- expressive
- Libraries
- Framer Motion
Durations
Easings
Side B · dark
Spline
Full Page
- Level
- expressive
- Libraries
- —
Durations
Easings
Palette & spacing overlap
Their palettes share 13% 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 83% (4, 6, 8, 10, 12 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, Neon's restraint reads as the safer default and Spline's rhythm provides the accent moments — pair them at section-level, not at component-level.