color.*

Overview

Colors in the Darvas indicator API are expressed as 8-character hex strings in #RRGGBBAA format, where the last two characters are the alpha channel (FF = fully opaque, 00 = fully transparent). The color namespace provides named constants and construction helpers.

Constructing colors

string

Create a color from a hex string with optional transparency (0-100, where 100 = fully transparent).

color.new("#FF0000", 0)   // fully opaque red: "#FF0000FF"
color.new("#FF0000", 50)  // 50% transparent red: "#FF000080"
color.new("#FF0000", 100) // invisible: "#FF000000"

For the full list of color.* functions including color.rgb, color.from_gradient, color.r, color.g, color.b, and color.t, see the custom indicator spec.

Named color constants

The runtime exposes 24 named colors via the color namespace:

Constant	Hex
`color.red`	`#ef4444FF`
`color.green`	`#22c55eFF`
`color.blue`	`#3b82f6FF`
`color.yellow`	`#eab308FF`
`color.orange`	`#f97316FF`
`color.purple`	`#a78bfaFF`
`color.white`	`#FFFFFFFF`
`color.black`	`#000000FF`
`color.gray`	`#6b7280FF`
`color.silver`	`#9ca3afFF`
`color.lime`	`#84cc16FF`
`color.teal`	`#14b8a6FF`
`color.cyan`	`#06b6d4FF`
`color.navy`	`#1e40afFF`
`color.maroon`	`#9f1239FF`
`color.fuchsia`	`#d946efFF`
`color.pink`	`#ec4899FF`
`color.rose`	`#f43f5eFF`
`color.amber`	`#f59e0bFF`
`color.emerald`	`#10b981FF`
`color.sky`	`#0ea5e9FF`
`color.violet`	`#8b5cf6FF`
`color.indigo`	`#6366f1FF`
`color.slate`	`#64748bFF`

Dynamic coloring example

const bullColor = input.color("Bull", "#22c55eFF");
const bearColor = input.color("Bear", "#ef4444FF");

plot("Candle color", null);

onBar(() => {
  const isBull = ctx.close() >= ctx.open();
  barcolor(isBull ? bullColor : bearColor);
  plot("Candle color", ctx.close());
});

Transparency with `color.new`

// RSI overbought zone shading
const obColor = color.new("#ef4444", 80); // very faint red fill

onBar(() => {
  const rsi = ta.rsi(ctx.close, 14);
  bgcolor(rsi > 70 ? obColor : null);
});

Plot basics

color option for plot series.

hline, fill, bgcolor

bgcolor and barcolor use the same color format.

Line entity

Entity colors also use #RRGGBBAA format.

Getting Started

Core Concepts

Plotting

Drawing Entities

Technical Analysis

Utility Namespaces

Examples

Reference

Overview

Constructing colors

Named color constants

Dynamic coloring example

Transparency with `color.new`

Plot basics

hline, fill, bgcolor

Line entity

​Overview

​Constructing colors

​Named color constants

​Dynamic coloring example

​Transparency with color.new

​Related pages

Plot basics

hline, fill, bgcolor

Line entity

Overview

Constructing colors

Named color constants

Dynamic coloring example

Transparency with `color.new`

Related pages