color
Specifies the color of the axis title.
This option supports the following colors:
- Hexadecimal colors
- RGB colors
- RGBA colors
- Predefined/cross-browser color names
- Predefined SVG colors
family
Specifies a font family for the axis title.
For details on acceptable values, refer to the Font family article.
opacity
Specifies how transparent the axis title should be.
This option accepts a value from 0 to 1, where 0 makes the axis title completely transparent, and 1 makes it opaque.
size
Specifies the axis title's font size.
A numeric value specifies the font size in pixels. A string value can specify the font size in any units listed here, but multi-line text only supports length units.
weight
Specifies a font weight for the axis title. Accepts values from 100 to 900 in increments of 100. Higher values increase boldness.
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