Image loses color/brightness after converting to webp

[MyNameIsQt]

Converting an image to webp changes the original color. How can I solve this problem?
left Jpeg, right: webp

QImageReader reader(m_strBkgndImagePath);
    std::shared_ptr<QImage> image = std::make_shared<QImage>(reader.read());

    int width = image->size().width();
    int height = image->size().height();

    WebPConfig config;
    WebPConfigPreset(&config, WEBP_PRESET_DEFAULT, 80/*quality*/);
    config.lossless = 0; // Use lossy compression
    config.alpha_quality = 100; // Maximum alpha quality
    config.use_sharp_yuv = 1; // Use RGB color space

    // Set up memory writer
    WebPMemoryWriter writer;
    WebPMemoryWriterInit(&writer);
    WebPPicture pic;
    WebPPictureInit(&pic);

    // Set up picture
    pic.use_argb = 1;
    pic.width = width;
    pic.height = height;
    pic.colorspace = WEBP_YUV420;
    pic.writer = WebPMemoryWrite;
    pic.custom_ptr = &writer;

    // Copy image data to picture
    const uint8_t* src = reinterpret_cast<const uint8_t*>(image->constBits());
    const int src_stride = width * 4;
    if (!WebPPictureImportRGBA(&pic, src, src_stride)) {
        WebPPictureFree(&pic);
        return false;
    }

    // Compress the image
    if (!WebPEncode(&config, &pic)) {
        WebPPictureFree(&pic);
        return false;
    }

    // Write the compressed image data to file
    QFileInfo fileInfo(m_strBkgndImagePath);
    QString webpFileName = fileInfo.path() + QDir::separator() + fileInfo.baseName() + ".webp";
    cout << webpFileName.toStdString() << endl;

    FILE* file = fopen(webpFileName.toStdString().c_str(), "wb");
    if (!file) {
        WebPPictureFree(&pic);
        return false;
    }
    const size_t output_size = writer.size;
    if (output_size > 0) {
        const size_t bytes_written = fwrite(writer.mem, 1, output_size, file);
        if (bytes_written != output_size) {
            fclose(file);
            WebPPictureFree(&pic);
            return false;
        }
        m_bkgndHeader.ImageSize = output_size;
    }
    fclose(file);
    WebPPictureFree(&pic);

    return true;

[ChrisW67]

@MyNameIsQt I would be guessing that the QImage internal data is stored in ARGB layout (A = 0xff probably), and you are asking the foreign library to treat that as RGBA. You lose the blue and get a strong red. Take a look at QImage::format().