Hydra
#006995
A blue that is muted. It is mid — the hardest range to put text on, either colour struggles.
Hex
#006995
RGB
0, 105, 149
OKLCh
49.3% 0.106 236.2°
CIELAB (D50)
41.1, -13.4, -31.8
What is true of this colour, and of no other
- 8 other named colours sit within ΔE00 2 of it.
- It sits exactly on the sRGB boundary: at this lightness and hue the gamut has nothing left, and a wider display would show a more colourful version of it.
- As text on white it measures APCA Lc 79.8; on black, Lc -22.1. 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 18.9 and 18.2 and 17.3 — no red cone.
Text on this colour
White text
6.08:1 — passes AA
Black text
3.45:1 — large text only
White text is the better of the two at6.08:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#006995
protanopia
#636395 · ΔE00 18.9
deuteranopia
#595996 · ΔE00 18.2
tritanopia
#4c4cdd · ΔE00 17.3
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isSea Blue at ΔE00 0.292: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.
- Sea BlueΔE00 0.292 · #006994
- Peacock BlueΔE00 0.974 · #016795
- Port au PrinceΔE00 0.996 · #006a93
- Europe BlueΔE00 1.164 · #006796
- CairnsΔE00 1.566 · #0a6b92
- Kingfisher BlueΔE00 1.811 · #006491
- Pulsating BlueΔE00 1.851 · #01678d
- DisarmΔE00 1.876 · #006e9d
- ReservoirΔE00 2.261 · #01638b
- Impulse BlueΔE00 2.278 · #006699
- Wavy NavyΔE00 2.288 · #006597
- BondiΔE00 2.349 · #16698c
11 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.