Neptune’s Dream
#003368
A blue that is muted. It is dark — it carries white text and needs care with black.
Hex
#003368
RGB
0, 51, 104
OKLCh
32.5% 0.105 254.6°
CIELAB (D50)
20.9, 2.7, -36.1
What is true of this colour, and of no other
- 7 other named colours sit within ΔE00 2 of it.
- It sits exactly on the sRGB boundary: at this lightness and hue the gamut has nothing left, and a wider display would show a more colourful version of it.
- As text on white it measures APCA Lc 97.9; 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 9.3 and 9.1 and 9.6 — no red cone.
Text on this colour
White text
12.55:1 — passes AA
Black text
1.67:1 — fails AA
White text is the better of the two at12.55:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#003368
protanopia
#303068 · ΔE00 9.3
deuteranopia
#2a2a68 · ΔE00 9.1
tritanopia
#232386 · ΔE00 9.6
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isPrussian Blue at ΔE00 0.313: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.
- Prussian BlueΔE00 0.313 · #003366
- Funnel CloudΔE00 1.696 · #113366
- Konjō BlueΔE00 1.702 · #003171
- Lost in SpaceΔE00 1.731 · #03386a
- Cool BlackΔE00 1.753 · #002e63
- Marine BlueΔE00 1.82 · #01386a
- MarineΔE00 1.96 · #042e60
- Dark Midnight BlueΔE00 2.041 · #003377
- Effervescent BlueΔE00 2.166 · #00315a
- Azure DragonΔE00 2.306 · #053976
- Deep Sea DreamΔE00 2.36 · #002d69
- Ambassador BlueΔE00 2.459 · #0d2f5a
10 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.