| `tickColor` | [`Color`](../general/colors.md) | Yes | Yes | | Color of the tick line. If unset, defaults to the grid line color.
| `tickLength` | `number` | | | `10` | Length in pixels that the grid lines will draw into the axis area.
| `tickWidth` | `number` | Yes | Yes | | Width of the tick mark in pixels. If unset, defaults to the grid line width.
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| `z` | `number` | | | `0` | z-index of gridline layer. Values <= 0 are drawn under datasets, > 0 on top.
The scriptable context is described in [Options](../general/options.md#tick) section.