Deep Lagoon
#005a6f
A cyan 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
#005a6f
RGB
0, 90, 111
OKLCh
43.3% 0.079 220.8°
CIELAB (D50)
34.6, -17.6, -19.0
What is true of this colour, and of no other
- 12 other named colours sit within ΔE00 2 of it — this part of the space is crowded, and the names here are finer distinctions than most people make.
- 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 86.6; on black, Lc -15.5. 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 21.1 and 21.0 and 20.4 — no red cone.
Text on this colour
White text
7.80:1 — passes AA
Black text
2.69:1 — fails AA
White text is the better of the two at7.80:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#005a6f
protanopia
#55556f · ΔE00 21.1
deuteranopia
#4c4c70 · ΔE00 21.0
tritanopia
#4040b6 · ΔE00 20.4
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isSea Creature at ΔE00 0.665: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.
- Sea CreatureΔE00 0.665 · #00586d
- Brave New TealΔE00 1.292 · #015b6d
- Connor’s LakefrontΔE00 1.337 · #175a6c
- SubmersibleΔE00 1.368 · #00576e
- Octagon OceanΔE00 1.423 · #085b73
- BosporusΔE00 1.467 · #015d75
- OceansideΔE00 1.629 · #015a6b
- SubaqueousΔE00 1.668 · #00576f
- Lyons BlueΔE00 1.668 · #005e76
- PlungeΔE00 1.736 · #035568
- Deep Blue SeaΔE00 1.792 · #1a5d72
- Blue CoralΔE00 1.866 · #1d5a6e
10 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.