Washed out colors on the vulkan renderer

[Tofixrs]

Is your issue REALLY a bug?

• My issue is indeed a bug!
• I am not crazy! I will not fill out this form just to ask a question or request a feature. Pinky promise.

Is there an existing issue for this?

• I have searched the existing issues.

Is this issue related to iced?

• My hardware is compatible and my graphics drivers are up-to-date.

What happened?

On the vulkan renderer the colors are washed out

What is the expected behavior?

Colors being normal (img from the gl renderer)

Version

crates.io release

Operating System

Linux

Do you have any log output?

Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.28s
     Running `target/debug/chat-desktop`
2026-07-29T17:44:44.574652Z  INFO iced_winit: System theme: Dark
2026-07-29T17:44:44.574816Z  INFO iced_winit: Window attributes for id `Id(
    1,
)`: WindowAttributes {
    inner_size: Some(
        Logical(
            LogicalSize {
                width: 1024.0,
                height: 768.0,
            },
        ),
    ),
    min_inner_size: None,
    max_inner_size: None,
    position: None,
    resizable: true,
    enabled_buttons: WindowButtons(
        CLOSE | MINIMIZE | MAXIMIZE,
    ),
    title: "Chat Desktop - Iced",
    maximized: false,
    visible: false,
    transparent: false,
    blur: false,
    decorations: true,
    window_icon: None,
    preferred_theme: None,
    resize_increments: None,
    content_protected: false,
    window_level: Normal,
    active: true,
    cursor: Icon(
        Default,
    ),
    parent_window: None,
    fullscreen: None,
    platform_specific: PlatformSpecificWindowAttributes {
        name: Some(
            ApplicationName {
                general: "",
                instance: "",
            },
        ),
        activation_token: None,
        x11: X11WindowAttributes {
            visual_id: None,
            screen_id: None,
            base_size: None,
            override_redirect: false,
            x11_window_types: [
                Normal,
            ],
            embed_window: None,
        },
    },
}
2026-07-29T17:44:44.672393Z  WARN wgpu_hal::vulkan::instance: Unable to find extension: VK_EXT_physical_device_drm
2026-07-29T17:44:44.700753Z  INFO iced_wgpu::window::compositor: Settings {
    present_mode: AutoVsync,
    backends: Backends(
        VULKAN,
    ),
    default_font: Font {
        family: SansSerif,
        weight: Normal,
        stretch: Normal,
        style: Normal,
    },
    default_text_size: Pixels(
        16.0,
    ),
    antialiasing: Some(
        MSAAx4,
    ),
}
2026-07-29T17:44:44.710802Z  INFO iced_wgpu::window::compositor: Available adapters: [
    AdapterInfo {
        name: "AMD Radeon Graphics (RADV RENOIR)",
        vendor: 4098,
        device: 5688,
        device_type: IntegratedGpu,
        driver: "radv",
        driver_info: "Mesa 26.1.2",
        backend: Vulkan,
    },
    AdapterInfo {
        name: "NVIDIA GeForce RTX 3050 Laptop GPU",
        vendor: 4318,
        device: 9634,
        device_type: DiscreteGpu,
        driver: "NVIDIA",
        driver_info: "595.80",
        backend: Vulkan,
    },
    AdapterInfo {
        name: "llvmpipe (LLVM 21.1.8, 256 bits)",
        vendor: 65541,
        device: 0,
        device_type: Cpu,
        driver: "llvmpipe",
        driver_info: "Mesa 26.1.2 (LLVM 21.1.8)",
        backend: Vulkan,
    },
]
2026-07-29T17:44:44.714498Z  INFO iced_wgpu::window::compositor: Selected: AdapterInfo {
    name: "NVIDIA GeForce RTX 3050 Laptop GPU",
    vendor: 4318,
    device: 9634,
    device_type: DiscreteGpu,
    driver: "NVIDIA",
    driver_info: "595.80",
    backend: Vulkan,
}
2026-07-29T17:44:44.715149Z  INFO iced_wgpu::window::compositor: Available formats: Copied {
    it: Iter(
        [
            Bgra8UnormSrgb,
            Rgba8UnormSrgb,
            Rgba16Float,
            Rgb10a2Unorm,
            Bgra8Unorm,
            Rgba8Unorm,
        ],
    ),
}
2026-07-29T17:44:44.715175Z  INFO iced_wgpu::window::compositor: Available alpha modes: [
    Opaque,
    PreMultiplied,
]
2026-07-29T17:44:44.715188Z  INFO iced_wgpu::window::compositor: Selected format: Rgba16Float with alpha mode: PreMultiplied

[pml68]

I have a feeling it's the Rgba16Float format that was selected (very last line in logs)

If you check the logs with the gl renderer selected, does it instead pick a U8 format?

[Tofixrs]

yea
this is what is getting selected with opengl
2026-07-29T20:26:58.993751Z INFO iced_wgpu::window::compositor: Selected format: Rgba8Unorm with alpha mode: Auto

[pml68]

Do you happen to have an HDR display by chance?

[Tofixrs]

nope