designed a stats card using html and css (mobile and desktop)

Replace <div class="container"> with the main tag to fix the accessibility issues. click here for more on web-accessibility and semantic html

Use the colors that were given in the styleguide.md found in the zip folder you downloaded.

For the color of the image, give .pixdiv a background color of soft violet and add height of 100% object-fit: cover, mix-blend-mode: multiply and opacity: 0.8. to .pix.

.pixdiv{
background-color: hsl();
}
.pix{
width: 100%;
height: 100%;
object-fit: cover;
mix-blend-mode: multiply;
opacity: 0.8;
}

Use relative units like rem or em as unit for the padding, margin, width values and preferably rem for the font-size values, instead of using px which is an absolute unit. For more on CSS units Click here

Hope am helpful.

Well done for completing this challenge. HAPPY CODING