Design language comparison
Blackalgo vs Spline
Both Blackalgo and Spline commit to a dark-canvas approach, and they pair different display families (TWKLausanne vs Spline Sans). Beyond surface, motion levels are both expressive.
Palette · side by side
Up to 8 dominant swatches eachSide A · dark
Blackalgo
Full Page
#ededf8
background
#e5e7eb
neutral
#000000
foreground
#ff587a
accent
#5fffd7
accent
#01010d
accent
#e9e9fb
background
#c9cafd
accent
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
Blackalgo
Full Page
- Display
- TWKLausanne
- Body
- GeistMono
- Mono
- GeistMono
- Weights
- 300 · 350 · 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
Blackalgo
Full Page
- Base unit
- 4 px
- Container max
- 1312 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
Blackalgo
Full Page
- Level
- expressive
- Libraries
- —
Durations
Easings
Side B · dark
Spline
Full Page
- Level
- expressive
- Libraries
- —
Durations
Easings
Palette & spacing overlap
Their palettes share 11% 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 92% (2, 4, 6, 8, 10 px shared) — a rhythm any agent can transfer between the two systems with minimal recalibration.
Shared swatches (1)
Curator verdict
If you are building an interface that needs to reference both, Blackalgo's restraint reads as the safer default and Spline's rhythm provides the accent moments — pair them at section-level, not at component-level.