Clean Slate
#577396
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
#577396
RGB
87, 115, 150
OKLCh
54.8% 0.064 254.4°
CIELAB (D50)
47.3, -3.3, -22.6
What is true of this colour, and of no other
- 9 other named colours sit within ΔE00 2 of it.
- It uses only 36% 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 73.8; on black, Lc -27.9. 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 10.5 and 10.0 and 7.4 — no red cone.
Text on this colour
White text
4.89:1 — passes AA
Black text
4.30:1 — large text only
White text is the better of the two at4.89:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#577396
protanopia
#707096 · ΔE00 10.5
deuteranopia
#6c6c96 · ΔE00 10.0
tritanopia
#6666c1 · ΔE00 7.4
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isYawl at ΔE00 1.151: between 1 and 2 — a trained eye spots it when the two touch; nobody spots it across a room. What the numbers mean.
- YawlΔE00 1.151 · #547497
- Blue JacketΔE00 1.291 · #597193
- BoathouseΔE00 1.318 · #577190
- French DiamondΔE00 1.339 · #597191
- Moonlight BlueΔE00 1.389 · #567090
- TrusteeΔE00 1.572 · #527498
- Privileged EliteΔE00 1.711 · #597695
- Charter BlueΔE00 1.915 · #546e91
- Quiet HarbourΔE00 1.973 · #5a789a
- Coronet BlueΔE00 2.017 · #59728e
- Laguna BlueΔE00 2.055 · #5a7490
- Rushing RiverΔE00 2.115 · #5f7797
11 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.