Lava Rock
#535e64
A neutral that has no useful hue — it reads as a grey. It is mid — the hardest range to put text on, either colour struggles.
Hex
#535e64
RGB
83, 94, 100
OKLCh
47.5% 0.017 231.5°
CIELAB (D50)
39.1, -3.4, -5.0
What is true of this colour, and of no other
- 8 other named colours sit within ΔE00 2 of it.
- It uses only 17% 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 82.9; on black, Lc -19.0. 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 6.1 and 6.6 and 14.1 — no red cone.
Text on this colour
White text
6.66:1 — passes AA
Black text
3.15:1 — large text only
White text is the better of the two at6.66:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#535e64
protanopia
#5d5d64 · ΔE00 6.1
deuteranopia
#5b5b64 · ΔE00 6.6
tritanopia
#59597d · ΔE00 14.1
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isMysterious at ΔE00 0.544: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.
- MysteriousΔE00 0.544 · #535e63
- City RainΔE00 0.892 · #525c61
- Novelty NavyΔE00 1.278 · #515b62
- Marine MagicΔE00 1.628 · #515e62
- Dark and Stormy NightΔE00 1.758 · #4f5a62
- Limousine Grey BlueΔE00 1.851 · #535f62
- Greys HarborΔE00 1.974 · #596368
- Wizard GreyΔE00 1.986 · #525e68
- CalligraphyΔE00 2.084 · #59636a
- WellermanΔE00 2.108 · #54606a
- TurbulenceΔE00 2.209 · #555c63
- Yacht ClubΔE00 2.258 · #566062
11 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.