[Minor issue] Adjust U+984F 顏 and U+9854 顔 and possibly U+989C 颜

[zhenlige]

The bottom left corner of U+984F 顏 and U+9854 顔 look slightly unbalanced. In both glyphs, the bottom of the 彡 component is lower than the long 丿 stroke, and the last stroke of 彡 is too curved down, making the bottom left corner unbalanced. Additionally, the vertical proportion of U+9854 顔 is slightly unbalanced, as the top 立-like part is too tall at thin weights. U+989C 颜 is OK at Regular, but the 彡 component is slightly squished at Heavy.

My suggestion:

For U+989C 颜, do nothing, or slightly adjust the vertical proportion for aesthetics. Regular is virtually unchanged.

For U+9854 顔, adjust the 彦 component to mach U+989C 颜.

For U+984F 顏, adjust the ⿸厂彡 part to make 丿 slightly longer and 彡 slightly higher.

PS: For Serif, CN is OK, and JP looks generally OK at thin weights, since the stroke tips are less significant than Sans and the strokes of 彡 are less curved, but still unbalanced at heavier weights.