1. 

   Natural Color System / NCS - S 8010-R90B

   hsl(217, 0%, 0%) / cyan: 0.26, magenta: 0.16, yellow: 0.00, key: 0.80 / LRV ≈ 2.3%

2. 

   Sigma - Cool Blue / S 8010-R90B

   hsl(203, 0%, 0%) / cyan: 0.32, magenta: 0.12, yellow: 0.00, key: 0.72 / LRV ≈ 4.7%

3. 

   Beckers - Supernova 773 / S 8010-R90B

   hsl(245, 0%, 0%) / cyan: 0.30, magenta: 0.33, yellow: 0.00, key: 0.73 / LRV ≈ 3.0%

4. 

   Natural Color System / NCS - S 8010-Y50R

   hsl(18, 0%, 0%) / cyan: 0.00, magenta: 0.29, yellow: 0.42, key: 0.76 / LRV ≈ 3.0%

5. 

   Natural Color System / NCS - S 8010-R70B

   hsl(246, 0%, 0%) / cyan: 0.18, magenta: 0.20, yellow: 0.00, key: 0.80 / LRV ≈ 2.3%

6. 

   Natural Color System / NCS - S 8010-Y70R

   hsl(15, 0%, 0%) / cyan: 0.00, magenta: 0.31, yellow: 0.41, key: 0.77 / LRV ≈ 2.6%

7. 

   Natural Color System / NCS - S 8010-R50B

   hsl(312, 0%, 0%) / cyan: 0.00, magenta: 0.20, yellow: 0.04, key: 0.81 / LRV ≈ 2.3%

8. 

   Natural Color System / NCS - S 8010-Y30R

   hsl(24, 0%, 0%) / cyan: 0.00, magenta: 0.25, yellow: 0.41, key: 0.76 / LRV ≈ 3.1%

9. 

   Natural Color System / NCS - S 8010-B90G

   hsl(156, 0%, 0%) / cyan: 0.21, magenta: 0.00, yellow: 0.09, key: 0.82 / LRV ≈ 2.6%

10. 

    Natural Color System / NCS - S 8010-G70Y

    hsl(51, 0%, 0%) / cyan: 0.00, magenta: 0.04, yellow: 0.25, key: 0.80 / LRV ≈ 3.0%