Silent Sea
#3a4a63
A blue that is nearly neutral — the hue shows only against a true grey. It is mid — the hardest range to put text on, either colour struggles.
Hex
#3a4a63
RGB
58, 74, 99
OKLCh
40.6% 0.047 259.2°
CIELAB (D50)
30.9, -1.1, -16.9
What is true of this colour, and of no other
- 6 other named colours sit within ΔE00 2 of it.
- It uses only 30% of the chroma available at this lightness and hue — there is a far more vivid version of this colour inside sRGB.
- As text on white it measures APCA Lc 90.6; on black, Lc -11.7. The sign is the polarity, which the WCAG ratio discards.
- Built into an eleven-step scale, 10 of the 10 adjacent pairs stay ΔE00 2 apart — see the ramp.
- protanopia and deuteranopia and tritanopia shift it by ΔE00 7.6 and 7.8 and 7.7 — no red cone.
Text on this colour
White text
8.98:1 — passes AA
Black text
2.34:1 — fails AA
White text is the better of the two at8.98:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#3a4a63
protanopia
#484863 · ΔE00 7.6
deuteranopia
#464663 · ΔE00 7.8
tritanopia
#43437d · ΔE00 7.7
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isEvening Glory at ΔE00 0.401: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.
- Evening GloryΔE00 0.401 · #3a4a62
- Calico DressΔE00 1.368 · #3d4e67
- MasterΔE00 1.499 · #3a4b61
- SpelunkingΔE00 1.535 · #35465e
- Garnet Stone BlueΔE00 1.924 · #384866
- Deep RoyalΔE00 1.996 · #364c68
- Luna PierΔE00 2.127 · #414d62
- Stay the NightΔE00 2.237 · #314662
- Naval BlueΔE00 2.24 · #384b6b
- Sargasso SeaΔE00 2.25 · #3d4a67
- Bonne NuitΔE00 2.313 · #3a4866
- Anthracite BlueΔE00 2.481 · #3d475e
9 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.