Marine
#042e60
A blue that is muted. It is dark — it carries white text and needs care with black.
Hex
#042e60
RGB
4, 46, 96
OKLCh
30.7% 0.099 256.2°
CIELAB (D50)
18.8, 3.4, -34.2
What is true of this colour, and of no other
- 7 other named colours sit within ΔE00 2 of it.
- It uses 94% of the chroma sRGB can show at this lightness and hue — close enough to the boundary that a wider display would show it slightly more vividly.
- As text on white it measures APCA Lc 99.4; on black, Lc 0.0. 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 8.3 and 8.1 and 8.6 — no red cone.
Text on this colour
White text
13.42:1 — passes AA
Black text
1.56:1 — fails AA
White text is the better of the two at13.42:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#042e60
protanopia
#2b2b60 · ΔE00 8.3
deuteranopia
#262660 · ΔE00 8.1
tritanopia
#20207a · ΔE00 8.6
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isCool Black at ΔE00 0.465: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.
- Cool BlackΔE00 0.465 · #002e63
- Ambassador BlueΔE00 1.136 · #0d2f5a
- Deep Sea DreamΔE00 1.322 · #002d69
- Blue LeviathanΔE00 1.631 · #032a62
- Funnel CloudΔE00 1.73 · #113366
- Neptune’s DreamΔE00 1.96 · #003368
- Prussian BlueΔE00 1.972 · #003366
- Konjō BlueΔE00 2.175 · #003171
- Dark Tyrian BlueΔE00 2.302 · #0d2b52
- Effervescent BlueΔE00 2.445 · #00315a
- Blue Jinn’sΔE00 2.472 · #002d72
- Atlantic NavyΔE00 2.603 · #13336f
10 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.