color

How do you colour a plot by its value? Blend two colours with color.from_gradient, or pick one with a condition and fade it with color.new. A colour is a value like any other, so it can change on every bar.

//@version=6
indicator("RSI, coloured by its level")
r = ta.rsi(close, 14)
// 30 and below is red, 70 and above green, and the levels between blend
plot(r, "RSI", color.from_gradient(r, 30, 70, color.red, color.green), 2)
hline(50, "Middle", color.new(color.gray, 50))

Transparency runs from 0, opaque, to 100, invisible, as on TradingView. A colour stores it as an alpha byte, round((1 - transp / 100) * 255), so color.t reads back a whole number.

color.b

Pine v6

color.b(color) → series float

The blue channel of a colour, from 0 to 255, or na for a na colour.

Parameter
color const color

color.from_gradient

Pine v6

color.from_gradient(value, bottom_value, top_value, bottom_color, top_color) → series color

The colour at value's place between bottom_value and top_value, blended from bottom_color to top_color.

Past either end it is that end's colour. The blend mixes the ends weighted by their own transparency, so a transparent end fades the other out rather than tinting it.

A gradient with no position is a colour, not na

Where value is na, or value, bottom_value and top_value are all equal, the result is colour 0: black at transparency 100, which na() reads as false and color.r, g, b and t read as 0, 0, 0 and 100. A na bottom_value or top_value gives na.

Parameter	Description
value series int/float	Where to read the gradient.
bottom_value series int/float	The value that gets bottom_color.
top_value series int/float	The value that gets top_color.
bottom_color series color	The colour at the bottom.
top_color series color	The colour at the top.

color.g

Pine v6

color.g(color) → series float

The green channel of a colour, from 0 to 255, or na for a na colour.

Parameter
color const color

color.new

Pine v6

color.new(color, transp) → series color

The colour with its transparency set to transp, whatever it had before.

A na colour starts from black, so color.new(na, 80) is black at transparency 80. A transp of na makes it fully transparent.

Parameter	Default	Description
color const color		The colour to start from.
transp series int/float	0AmenoScript only	The transparency, from 0 (opaque) to 100 (invisible).

color.r

Pine v6

color.r(color) → series float

The red channel of a colour, from 0 to 255, or na for a na colour.

Parameter
color const color

color.rgb

Pine v6

color.rgb(red, green, blue, transp) → series color

A colour from its red, green and blue channels and a transparency.

Each channel is held between 0 and 255 and cut to a whole number, so 2.5 is 2.

Parameter	Default	Description
red const int/float		The red channel, from 0 to 255.
green const int/float		The green channel, from 0 to 255.
blue const int/float		The blue channel, from 0 to 255.
transp const int/float	0	The transparency, from 0 (opaque) to 100 (invisible).

color.t

Pine v6

color.t(color) → series float

The transparency of a colour, from 0 (opaque) to 100 (invisible), as a whole number.

Parameter
color const color

color.*

The named colours, the same hex codes TradingView draws.

Each is a const color.

Name	Value
color.aqua	#00BCD4
color.black	#363A45
color.blue	#2962FF
color.fuchsia	#E040FB
color.gray	#787B86
color.green	#4CAF50
color.lime	#00E676
color.maroon	#880E4F
color.navy	#311B92
color.olive	#808000
color.orange	#FF9800
color.purple	#9C27B0
color.red	#F23645
color.silver	#B2B5BE
color.teal	#089981
color.white	#FFFFFF
color.yellow	#FDD835