Root

The root element customises the background of your image.

Property	Description
background_color	3 filling modes: Monochrome, Linear gradient, or Cmyka (print only)

Monochrome Color

Supported formats:

• 6 hex digits prefixed with #: #RRGGBB — e.g. #0000FF
• 8 hex digits prefixed with #: #RRGGBBAA — includes alpha — e.g. #0000FF80 (blue at 50% opacity)

Opacity reference:

Opacity (0–100)	Alpha hex
0	00
5	0D
10	1A
20	33
30	4D
40	66
50	80
60	99
70	B3
80	CC
90	E6
100	FF

WARNING

3-digit hex colors (e.g. #AAA) are not supported.

Linear Gradient

Can be used as background_color (banner background, button) or color (text).

Format:

linear-gradient(x1% y1% x2% y2%,offset1% #color1 opacity1,offset2% #color2 opacity2)

Parameter	Description
x1, y1, x2, y2	Percentages defining the gradient direction line
offset_color1, offset_color2	Start/end offsets (default: 0%, 100%)
hexa_color1, hexa_color2	6-digit hex start/end colors
opacity_color1, opacity_color2	Float 0–1, opacity of each color

Examples:

Value	Result
"background_color": "linear-gradient(0% 0% 100% 0%,0% #1a47ff 1,100% #b65151 1)"
"background_color": "linear-gradient(0% 0% 0% 100%,0% #1a47ff 1,100% #b65151 1)"
"background_color": "linear-gradient(0% 0% 100% 100%,0% #1a47ff 1,100% #b65151 1)"

Cmyk / Cmyka Color

Used for print designs only. Two formats are accepted:

• cmyk(c,m,y,k) — 4 values, each 0–100. Fully opaque. Example: cmyk(0,0,0,0)
• cmyka(c,m,y,k,t) — 5 values, adds alpha transparency (0–100). Example: cmyka(0,0,0,0,100)

Both function names are valid. cmyk() is equivalent to cmyka() with alpha set to 100 (fully opaque).