One Minute to Midnight
#003388
A blue that is saturated. It is dark — it carries white text and needs care with black.
Hex
#003388
RGB
0, 51, 136
OKLCh
35.4% 0.150 260.7°
CIELAB (D50)
23.2, 14.8, -52.6
What is true of this colour, and of no other
- 4 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 95.6; 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 6.3 and 6.5 and 7.8 — no red cone.
Text on this colour
White text
11.48:1 — passes AA
Black text
1.83:1 — fails AA
White text is the better of the two at11.48:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#003388
protanopia
#303088 · ΔE00 6.3
deuteranopia
#2a2a88 · ΔE00 6.5
tritanopia
#23239f · ΔE00 7.8
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isMagnus Blue at ΔE00 1.16: between 1 and 2 — a trained eye spots it when the two touch; nobody spots it across a room. What the numbers mean.
- Magnus BlueΔE00 1.16 · #003686
- US Air Force BlueΔE00 1.543 · #00308f
- Dark Seashore NightΔE00 1.69 · #113691
- Cobalt Blue TarantulaΔE00 1.916 · #02367d
- Below the SurfaceΔE00 2.026 · #0a2f7c
- SmaltΔE00 2.188 · #003399
- Dark Midnight BlueΔE00 2.199 · #003377
- Bavarian BlueΔE00 2.438 · #1c3382
- Surf the WebΔE00 2.766 · #20377f
- Konjō BlueΔE00 2.861 · #003171
- Twilight ExpressΔE00 2.974 · #1c3378
- Mystery OceansΔE00 2.981 · #063c89
9 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.