Not clear if this is intended behavior, but the background of U+1F97A uses fill color #FFCC4D, whereas U+1F448 and U+1F449 use #FFDC5D.
For example, you can see how 🥺 is not the same color as the hands just below it:
Picking some other yellow-colored face/hand twemojis shows a mixture of #FFCC4D and #FFDC5D.
I had originally thought this might be a "hand"/"body part" vs "face" distinction, but looking at other twemoji like U+1F9D1 (a face shape with #FFDC5D as the background) suggests that's not entirely accurate. Twemojis like U+1F486 use the same color (also #FFDC5D) for hand+face body-parts, so it seems reasonable to believe hand- and face-shaped twemojis are supposed to use the same tone map.
Not clear if this is intended behavior, but the background of U+1F97A uses fill color #FFCC4D, whereas U+1F448 and U+1F449 use #FFDC5D.
For example, you can see how 🥺 is not the same color as the hands just below it:
Picking some other yellow-colored face/hand twemojis shows a mixture of #FFCC4D and #FFDC5D.
I had originally thought this might be a "hand"/"body part" vs "face" distinction, but looking at other twemoji like U+1F9D1 (a face shape with #FFDC5D as the background) suggests that's not entirely accurate. Twemojis like U+1F486 use the same color (also #FFDC5D) for hand+face body-parts, so it seems reasonable to believe hand- and face-shaped twemojis are supposed to use the same tone map.