- 0 100-100-100 ffffff 0
- 12.5 94.1-94.1-94.1 f0f0f0 94.8
- 25 88.2-88.2-88.2 e1e1e1 89.5
- 37.5 81.2-81.2-81.2 cfcfcf 83.1
- 50 73.7-73.7-73.7 bcbcbc 76.2
- 62.5 64.7-64.7-64.7 a5a5a5 67.7
- 75 53.7-53.7-53.7 898989 57.1
- 87.5 38.8-38.8-38.8 636363 42
- 100 0-0-0 000000 0
9階調グレースケールのRGBとHTML表記と輝度
updated: 2026/02/11
created: 2026/02/11