Birdie Num Num
#89acda
A blue that is nearly neutral — the hue shows only against a true grey. It is light — black text sits on it comfortably, white text does not.
Hex
#89acda
RGB
137, 172, 218
OKLCh
73.6% 0.077 255.4°
CIELAB (D50)
69.0, -3.8, -27.5
What is true of this colour, and of no other
- 6 other named colours sit within ΔE00 2 of it.
- It uses 56% of the chroma sRGB can show at this lightness and hue.
- As text on white it measures APCA Lc 46.1; on black, Lc -56.0. 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 11.0 and 10.3 and 7.9 — no red cone.
Text on this colour
White text
2.34:1 — fails AA
Black text
8.98:1 — passes AA
Black text is the better of the two at8.98:1. That is enough for body text.
As text on white, it needs to change
#5879a4 is the nearest colour of the same hue that passes AA on white, at 4.50:1. Only the lightness moved.
The same colour, with one cone missing
As you see it
#89acda
protanopia
#a9a9da · ΔE00 11.0
deuteranopia
#a3a3da · ΔE00 10.3
tritanopia
#9c9cff · ΔE00 7.9
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isBoy Blue at ΔE00 0.959: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.
- Boy BlueΔE00 0.959 · #8cacd6
- Queer BlueΔE00 0.991 · #88ace0
- Placid BlueΔE00 1.329 · #88a9d2
- SwiftΔE00 1.437 · #82aadc
- Buoyant BlueΔE00 1.479 · #84addb
- Casual WaterΔE00 1.867 · #8fabd6
- Black DropΔE00 2.196 · #90abd9
- WindfallΔE00 2.202 · #84a7ce
- Blue CueΔE00 2.381 · #84a5dc
- Cotton Wool BlueΔE00 2.41 · #83abd2
- Polo BlueΔE00 2.519 · #8aa7cc
- Paula Loves ParisΔE00 2.764 · #80a4cd
10 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.