# How to properly use std.Io.Terminal.setColor() in Zig 0.17?

**URL:** <https://ziggit.dev/t/how-to-properly-use-std-io-terminal-setcolor-in-zig-0-17/17598>\
**Category:** Help\
**Tags:** standard-library\
**Created:** [September 13, 2026, 9:03pm UTC](https://ziggit.dev/t/how-to-properly-use-std-io-terminal-setcolor-in-zig-0-17/17598 "2026-09-13T21:03:38Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![Epydi](https://ziggit.dev/user_avatar/ziggit.dev/epydi/32/10155_2.png) [@Epydi](https://ziggit.dev/u/Epydi)\
**Post date:** [September 13, 2026, 9:03pm UTC](https://ziggit.dev/t/how-to-properly-use-std-io-terminal-setcolor-in-zig-0-17/17598/1 "2026-09-13T21:03:39Z")

</div>

Hi! I’m learning Zig 0.17.0-dev and I’m trying to understand the new std.Io.Terminal API.

I can write to stdout like this:

```zig
const std = @import("std");
pub fn main(init: std.process.Init) !void {
    const io = init.io;
    var stdout_writer = std.Io.File.stdout().writer(io, &.{});
    const stdout = &stdout_writer.interface;
    try stdout.print("Hello world!\n", .{});
}

```

But I can’t figure out how to use `std.Io.Terminal.setColor()` correctly.

From what I understand, setColor needs a Terminal and a Color, but I’m not sure how I’m supposed to obtain/create the Terminal object from std.process.Init / [init.io](http://init.io), and how it should be connected to the stdout writer.

What is the intended Zig 0.17 way to do something as simple as:

print “Hello” in green  
print " world" in default color

I’d also appreciate an explanation of what the Terminal abstraction represents here and how it differs from simply writing ANSI escape sequences to stdout.

Thanks!

---

<div class="post-metadata">

**Author:** ![jmstevers](https://ziggit.dev/user_avatar/ziggit.dev/jmstevers/32/9230_2.png) [@jmstevers](https://ziggit.dev/u/jmstevers)\
**Post date:** [September 13, 2026, 9:15pm UTC](https://ziggit.dev/t/how-to-properly-use-std-io-terminal-setcolor-in-zig-0-17/17598/2 "2026-09-13T21:15:36Z")

</div>

```zig
const std = @import("std");

pub fn main(init: std.process.Init) !void {
    const io = init.io;
    var stdout_writer = std.Io.File.stdout().writer(io, &.{});
    const stdout = &stdout_writer.interface;
    const terminal: std.Io.Terminal = .{
        .writer = stdout,
        .mode = try .detect(io, .stdout(), false, false),
    };
    try terminal.setColor(.green);
    try stdout.writeAll("Hello");
    try terminal.setColor(.reset);
    try stdout.writeAll(" world\n");
    try stdout.flush();
}

```

`std.Io.Terminal` is cross platform in that it works with escape codes and windows terminal colors. Or it can not write colors depending on the mode. `std.Io.Terminal.Mode.detect` checks if the file supports escape codes or windows colors and returns `Mode` accordingly. Or you can force color mode. Or force not force color mode.