A single color, old lace, is not working for me as a theme-color in the meta tag in Chrome Android.
Other colors work well. I tried providing the hex triplet instead and still nothing.
<html>
<head>
....
<meta name="theme-color" content="oldlace"> <!-- content="#fdf5e6" doesn't work either -->
....
</head>
<body>
....
</body>
</html>
It just appears as the default white instead of the wanted color.
Here is a description from WHATWG
When using the theme color in UI, user agents may adjust it in implementation-specific ways to make it more suitable for the UI in question.
Color #fdf5e6
is a QUESTION here, because its too light to have a enough contrast.
Same problem with color #f5f5f5f
and any other light colors.