Admiral Blue
#50647f
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
#50647f
RGB
80, 100, 127
OKLCh
49.8% 0.050 256.0°
CIELAB (D50)
41.5, -2.3, -17.8
What is true of this colour, and of no other
- 4 other named colours sit within ΔE00 2 of it.
- It uses only 29% 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 80.2; on black, Lc -21.6. 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 9.0 and 9.1 and 7.5 — no red cone.
Text on this colour
White text
6.05:1 — passes AA
Black text
3.47:1 — large text only
White text is the better of the two at6.05:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#50647f
protanopia
#62627f · ΔE00 9.0
deuteranopia
#5f5f7f · ΔE00 9.1
tritanopia
#5b5ba1 · ΔE00 7.5
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isLuxe Blue at ΔE00 0.809: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.
- Luxe BlueΔE00 0.809 · #516582
- Evening SymphonyΔE00 1.078 · #51637b
- Stained GlassΔE00 1.616 · #556682
- DanaΔE00 1.909 · #576780
- StreamΔE00 2.293 · #495e7b
- Night MarketΔE00 2.475 · #4c6177
- Aurora BorealisΔE00 2.587 · #556b87
- Parlour BlueΔE00 2.592 · #465f7e
- NightlyΔE00 2.74 · #536078
- Climate ControlΔE00 2.82 · #466082
- Sapphire EarbobsΔE00 2.846 · #4f5f7e
- LoyaltyΔE00 2.887 · #4e6175
11 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.