Iridescent
#3a5b52
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
#3a5b52
RGB
58, 91, 82
OKLCh
44.3% 0.042 175.3°
CIELAB (D50)
35.9, -14.3, 1.2
What is true of this colour, and of no other
- 4 other named colours sit within ΔE00 2 of it.
- It uses 50% of the chroma sRGB can show at this lightness and hue.
- As text on white it measures APCA Lc 86.0; on black, Lc -16.0. 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 13.6 and 14.4 and 27.4 — no red cone.
Text on this colour
White text
7.50:1 — passes AA
Black text
2.80:1 — fails AA
White text is the better of the two at7.50:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#3a5b52
protanopia
#585852 · ΔE00 13.6
deuteranopia
#535353 · ΔE00 14.4
tritanopia
#4d4d8e · ΔE00 27.4
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isTrekking Green at ΔE00 0.876: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.
- Trekking GreenΔE00 0.876 · #3d5c54
- Balsam BranchΔE00 1.377 · #36574e
- EmersonΔE00 1.806 · #3e6058
- Patio GreenΔE00 1.813 · #3f5a50
- Midnight CloverΔE00 2.014 · #3c574e
- Woodlawn GreenΔE00 2.018 · #405b50
- Holly BushΔE00 2.157 · #355d51
- HypnotismΔE00 2.287 · #32584c
- SpectraΔE00 2.485 · #375d4f
- Crystal BallΔE00 2.488 · #365955
- Canadian FirΔE00 2.564 · #415a53
- PlantationΔE00 2.607 · #3e594c
11 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.