Only 3 colors constrast with both white and black by at least 4.5 to 1 (if you round up).
| # | Color against White | Contrast against White | Color against Black | Contrast against Black |
|---|---|---|---|---|
| 1 | #066 | 6.79 | #066 | 3.09 |
| 2 | #069 | 6.25 | #069 | 3.36 |
| 3 | #06c | 5.57 | #06c | 3.77 |
| 4 | #06f | 4.83 | #06f | 4.34 |
| 5 | #090 | 3.78 | #090 | 5.56 |
| 6 | #093 | 3.75 | #093 | 5.6 |
| 7 | #096 | 3.65 | #096 | 5.75 |
| 8 | #099 | 3.49 | #099 | 6.02 |
| 9 | #09c | 3.27 | #09c | 6.43 |
| 10 | #33f | 6.87 | #33f | 3.06 |
| 11 | #360 | 6.9 | #360 | 3.04 |
| 12 | #363 | 6.8 | #363 | 3.09 |
| 13 | #366 | 6.5 | #366 | 3.23 |
| 14 | #369 | 6 | #369 | 3.5 |
| 15 | #36c | 5.37 | #36c | 3.91 |
| 16 | #36f | 4.68 | #36f | 4.49 |
| 17 | #390 | 3.69 | #390 | 5.7 |
| 18 | #393 | 3.66 | #393 | 5.75 |
| 19 | #396 | 3.57 | #396 | 5.89 |
| 20 | #399 | 3.41 | #399 | 6.16 |
| 21 | #39c | 3.2 | #39c | 6.57 |
| 22 | #60f | 6.98 | #60f | 3.01 |
| 23 | #63f | 6.03 | #63f | 3.48 |
| 24 | #660 | 6.06 | #660 | 3.47 |
| 25 | #663 | 5.98 | #663 | 3.51 |
| 26 | #666 | 5.74 | #666 | 3.66 |
| 27 | #669 | 5.35 | #669 | 3.93 |
| 28 | #66c | 4.84 | #66c | 4.34 |
| 29 | #66f | 4.28 | #66f | 4.91 |
| 30 | #690 | 3.43 | #690 | 6.12 |
| 31 | #693 | 3.4 | #693 | 6.17 |
| 32 | #696 | 3.33 | #696 | 6.31 |
| 33 | #699 | 3.19 | #699 | 6.58 |
| 34 | #69c | 3 | #69c | 6.99 |
| 35 | #90c | 6.51 | #90c | 3.23 |
| 36 | #90f | 5.53 | #90f | 3.8 |
| 37 | #936 | 6.95 | #936 | 3.02 |
| 38 | #939 | 6.39 | #939 | 3.29 |
| 39 | #93c | 5.68 | #93c | 3.7 |
| 40 | #93f | 4.92 | #93f | 4.27 |
| 41 | #960 | 4.94 | #960 | 4.26 |
| 42 | #963 | 4.88 | #963 | 4.3 |
| 43 | #966 | 4.72 | #966 | 4.45 |
| 44 | #969 | 4.45 | #969 | 4.71 |
| 45 | #96c | 4.1 | #96c | 5.13 |
| 46 | #96f | 3.68 | #96f | 5.7 |
| 47 | #990 | 3.04 | #990 | 6.91 |
| 48 | #993 | 3.02 | #993 | 6.96 |
| 49 | #c00 | 5.89 | #c00 | 3.57 |
| 50 | #c03 | 5.81 | #c03 | 3.62 |
| 51 | #c06 | 5.59 | #c06 | 3.76 |
| 52 | #c09 | 5.21 | #c09 | 4.03 |
| 53 | #c0c | 4.73 | #c0c | 4.44 |
| 54 | #c0f | 4.19 | #c0f | 5.01 |
| 55 | #c30 | 5.2 | #c30 | 4.04 |
| 56 | #c33 | 5.14 | #c33 | 4.09 |
| 57 | #c36 | 4.96 | #c36 | 4.23 |
| 58 | #c39 | 4.67 | #c39 | 4.5 |
| 59 | #c3c | 4.27 | #c3c | 4.91 |
| 60 | #c3f | 3.83 | #c3f | 5.49 |
| 61 | #c60 | 3.84 | #c60 | 5.47 |
| 62 | #c63 | 3.81 | #c63 | 5.52 |
| 63 | #c66 | 3.71 | #c66 | 5.66 |
| 64 | #c69 | 3.54 | #c69 | 5.93 |
| 65 | #c6c | 3.31 | #c6c | 6.34 |
| 66 | #c6f | 3.04 | #c6f | 6.91 |
| 67 | #f00 | 4 | #f00 | 5.25 |
| 68 | #f03 | 3.96 | #f03 | 5.3 |
| 69 | #f06 | 3.86 | #f06 | 5.44 |
| 70 | #f09 | 3.68 | #f09 | 5.71 |
| 71 | #f0c | 3.43 | #f0c | 6.12 |
| 72 | #f0f | 3.14 | #f0f | 6.7 |
| 73 | #f30 | 3.67 | #f30 | 5.73 |
| 74 | #f33 | 3.64 | #f33 | 5.77 |
| 75 | #f36 | 3.55 | #f36 | 5.92 |
| 76 | #f39 | 3.4 | #f39 | 6.19 |
| 77 | #f3c | 3.18 | #f3c | 6.6 |