Increasing grayishness, off of original colors

#00ffff 10f0f0 20e0e0 30d0d0 40c0c0 50b0b0 60a0a0 709090
#00c0ff 10b0f0 20a0e0 3090d0 4080c0 5070b0 6060a0 bluish
#0080ff 1070f0 2060e0 3050d0 4040c0 bluish bluish bluish
#0040ff 1030f0 2020e0 bluish bluish bluish bluish bluish
#0000ff 1010f0 2020e0 3030d0 4040c0 5050b0 6060a0 707090 808080
#4000ff 3010f0 2020e0 bluish bluish bluish bluish bluish
#8000ff 7010f0 6020e0 5030d0 4040c0 bluish bluish bluish
#c000ff b010f0 a020e0 9030d0 8040c0 7050b0 6060a0 bluish
#ff00ff f010f0 e020e0 d030d0 c040c0 b050b0 a060a0 907070
#ff00c0 f010b0 e020a0 d03090 c04080 b05070 a06060 reddish
#ff0080 f01070 e02060 d03050 c04040 reddish reddish reddish
#ff0040 f01030 e02020 reddish reddish reddish reddish reddish
#ff0000 f01010 e02020 d03030 c04040 b05050 a06060 907070 808080
#ff4000 f03010 e02020 reddish reddish reddish reddish reddish
#ff8000 f07010 e07020 d05030 c04040 reddish reddish reddish
#ffc000 f0b010 e0a020 d09030 c08040 b07050 a06060 reddish
#ffff00 f0f010 e0e020 d0d030 c0c040 b0b050 a0a060 909070
#c0ff00 b0f010 a0e020 90d030 80c040 70b050 60a060 greenish
#80ff00 70f010 60e020 50d030 40c040 greenish greenish greenish
#40ff00 30f010 20e020 greenish greenish greenish greenish greenish
#00ff00 10f010 20e020 30d030 40c040 50b050 60a060 709070 808080
#00ff40 10f030 20e020 greenish greenish greenish greenish greenish
#00ff80 10f070 20e060 30d050 40c040 greenish greenish greenish
#00ffc0 10f0b0 20e0a0 30d090 40c080 50b070 60a060 greenish
#00ffff 10f0f0 20e0e0 30d0d0 40c0c0 50b0b0 60a0a0 709090