Stargazer
#3f5865
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
#3f5865
RGB
63, 88, 101
OKLCh
44.5% 0.037 231.3°
CIELAB (D50)
35.8, -7.0, -10.7
What is true of this colour, and of no other
- 4 other named colours sit within ΔE00 2 of it.
- It uses 41% of the chroma sRGB can show at this lightness and hue.
- As text on white it measures APCA Lc 86.1; 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 11.9 and 12.7 and 13.6 — no red cone.
Text on this colour
White text
7.51:1 — passes AA
Black text
2.80:1 — fails AA
White text is the better of the two at7.51:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#3f5865
protanopia
#565665 · ΔE00 11.9
deuteranopia
#525265 · ΔE00 12.7
tritanopia
#4d4d8f · ΔE00 13.6
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isAlien at ΔE00 1.028: between 1 and 2 — a trained eye spots it when the two touch; nobody spots it across a room. What the numbers mean.
- AlienΔE00 1.028 · #415764
- Saxon BlueΔE00 1.046 · #435965
- Midnight in the TropicsΔE00 1.173 · #435964
- Steiglitz FogΔE00 1.338 · #415862
- San JuanΔE00 2 · #445761
- Cadet SongΔE00 2.151 · #3b5964
- Dark SecretΔE00 2.217 · #3e5361
- Nocturne BlueΔE00 2.255 · #37525f
- Opera GlassesΔE00 2.284 · #365360
- Blue SpellΔE00 2.355 · #3b5c6c
- Slate WallΔE00 2.449 · #40535d
- Restless SeaΔE00 2.465 · #38515d
10 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.