1. 

   Natural Color System / NCS - S 2020-B30G

   hsl(182, 0%, 1%) / cyan: 0.30, magenta: 0.01, yellow: 0.00, key: 0.26 / LRV ≈ 43.7%

2. 

   Sigma - Cool Blue / S 2020-B30G

   hsl(184, 0%, 1%) / cyan: 0.23, magenta: 0.01, yellow: 0.00, key: 0.19 / LRV ≈ 54.5%

3. 

   Natural Color System / NCS - S 4550-B30G

   hsl(187, 1%, 0%) / cyan: 1.00, magenta: 0.12, yellow: 0.00, key: 0.67 / LRV ≈ 5.7%

4. 

   Natural Color System / NCS - S 5030-B30G

   hsl(188, 0%, 0%) / cyan: 0.57, magenta: 0.07, yellow: 0.00, key: 0.63 / LRV ≈ 8.1%

5. 

   Natural Color System / NCS - S 1020-B30G

   hsl(180, 0%, 1%) / cyan: 0.26, magenta: 0.00, yellow: 0.00, key: 0.15 / LRV ≈ 62.2%

6. 

   Natural Color System / NCS - S 5010-B30G

   hsl(180, 0%, 0%) / cyan: 0.16, magenta: 0.00, yellow: 0.00, key: 0.57 / LRV ≈ 14.3%

7. 

   Natural Color System / NCS - S 6020-B30G

   hsl(187, 0%, 0%) / cyan: 0.41, magenta: 0.05, yellow: 0.00, key: 0.68 / LRV ≈ 6.5%

8. 

   Natural Color System / NCS - S 6530-B30G

   hsl(188, 0%, 0%) / cyan: 0.66, magenta: 0.09, yellow: 0.00, key: 0.78 / LRV ≈ 2.8%

9. 

   Natural Color System / NCS - S 2010-B30G

   hsl(177, 0%, 1%) / cyan: 0.12, magenta: 0.00, yellow: 0.01, key: 0.26 / LRV ≈ 48.2%

10. 

    Natural Color System / NCS - S 0540-B30G

    hsl(182, 1%, 1%) / cyan: 0.58, magenta: 0.02, yellow: 0.00, key: 0.13 / LRV ≈ 57.8%