Raging Thunderstorm
#004f63
A cyan that is nearly neutral — the hue shows only against a true grey. It is dark — it carries white text and needs care with black.
Hex
#004f63
RGB
0, 79, 99
OKLCh
39.6% 0.073 222.3°
CIELAB (D50)
30.3, -15.7, -18.0
What is true of this colour, and of no other
- 2 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 90.5; on black, Lc -11.8. 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 20.1 and 20.2 and 18.9 — no red cone.
Text on this colour
White text
9.14:1 — passes AA
Black text
2.30:1 — fails AA
White text is the better of the two at9.14:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#004f63
protanopia
#4a4a63 · ΔE00 20.1
deuteranopia
#424264 · ΔE00 20.2
tritanopia
#3838a2 · ΔE00 18.9
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isHanada Blue at ΔE00 1.821: between 1 and 2 — a trained eye spots it when the two touch; nobody spots it across a room. What the numbers mean.
- Hanada BlueΔE00 1.821 · #044f67
- Teal Dark BlueΔE00 1.96 · #0f4d5c
- PlungeΔE00 2.048 · #035568
- Lazurite BlueΔE00 2.342 · #174c60
- Sandalwood Grey BlueΔE00 2.381 · #005160
- Blue PalisadeΔE00 2.43 · #01546d
- Nocturnal ExpeditionΔE00 2.432 · #114c5a
- Rainy MorningΔE00 2.518 · #005566
- Work BlueΔE00 2.69 · #004d67
- SubmersibleΔE00 2.733 · #00576e
- Ethereal DanceΔE00 2.848 · #1a4a5a
- SubaqueousΔE00 2.878 · #00576f
10 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.