Detector rail

Since 1.13 or earlier

2 px horizontal plate at the bottom

Colour

Value
Mid (L* 50)
Hue
Neutral
Texture
Busy

Shapes of this material

No stairsUse tuff stairs (ΔE 6.4)
No slabUse tuff slab (ΔE 6.4)
No wallUse tuff wall (ΔE 6.4)

Goes well with

One step lighter

The next band up in a gradient: same hue, no hard line.

Andesite7 lighterCobblestone5 lighterExposed cut copper4 lighter
One step darker

The next band down: shade under ledges and at the base.

Tuff bricks6 darkerCobbled deepslate16 darkerDark prismarine13 darker
Frame

A log or polished stone that contrasts in value, one block in front of the fill.

Polished blackstone28 darkerPolished diorite29 lighterPolished deepslate18 darker
Accent

A colour for about a tenth of the build, at the focal point.

Cinnabar6 darkerJungle planks3 lighterOak planks7 lighter

Closest colours

RailΔE 3.1Activator railΔE 4.0Powered railΔE 14.5

States

24 combinations
powered true, false
Redstone state. Visual only for doors, trapdoors and fence gates (no shape change); keep false.
shape north_south, east_west, ascending_east, ascending_west, ascending_north, ascending_south
Stair corner shape or rail course; see the type-specific meaning.
waterlogged true, false
true puts a water source inside the block (water renders around it). Always false for dry builds.