1. 

   Natural Color System / NCS - S 5005-B20G

   hsl(180, 0%, 0%) / cyan: 0.05, magenta: 0.00, yellow: 0.00, key: 0.55 / LRV ≈ 16.4%

2. 

   Sigma - Cool Blue / S 5005-B20G

   hsl(185, 0%, 1%) / cyan: 0.09, magenta: 0.01, yellow: 0.00, key: 0.44 / LRV ≈ 25.7%

3. 

   Natural Color System / NCS - S 5005-Y20R

   hsl(29, 0%, 0%) / cyan: 0.00, magenta: 0.14, yellow: 0.27, key: 0.49 / LRV ≈ 17.5%

4. 

   Natural Color System / NCS - S 5005-B80G

   hsl(140, 0%, 0%) / cyan: 0.08, magenta: 0.00, yellow: 0.05, key: 0.54 / LRV ≈ 17.1%

5. 

   Natural Color System / NCS - S 5005-Y50R

   hsl(23, 0%, 0%) / cyan: 0.00, magenta: 0.16, yellow: 0.26, key: 0.49 / LRV ≈ 16.5%

6. 

   Natural Color System / NCS - S 5005-G20Y

   hsl(83, 0%, 0%) / cyan: 0.04, magenta: 0.00, yellow: 0.11, key: 0.55 / LRV ≈ 16.2%

7. 

   Natural Color System / NCS - S 5005-R50B

   hsl(330, 0%, 0%) / cyan: 0.00, magenta: 0.08, yellow: 0.04, key: 0.53 / LRV ≈ 16.1%

8. 

   Natural Color System / NCS - S 5005-G80Y

   hsl(45, 0%, 0%) / cyan: 0.00, magenta: 0.05, yellow: 0.20, key: 0.53 / LRV ≈ 17.2%

9. 

   Natural Color System / NCS - S 5005-G50Y

   hsl(56, 0%, 0%) / cyan: 0.00, magenta: 0.01, yellow: 0.14, key: 0.55 / LRV ≈ 16.9%

10. 

    Natural Color System / NCS - S 5005-R20B

    hsl(357, 0%, 0%) / cyan: 0.00, magenta: 0.15, yellow: 0.14, key: 0.50 / LRV ≈ 16.3%