Space Battle Blue
#440099
A violet that is saturated. It is dark — it carries white text and needs care with black.
Hex
#440099
RGB
68, 0, 153
OKLCh
35.5% 0.200 290.7°
CIELAB (D50)
20.9, 50.3, -66.7
What is true of this colour, and of no other
- No other named colour in the set is within ΔE00 2 of it — it stands alone.
- 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 95.8; on black, Lc 0.0. 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 6.8 and 7.9 and 12.6 — no red cone.
Text on this colour
White text
12.31:1 — passes AA
Black text
1.71:1 — fails AA
White text is the better of the two at12.31:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#440099
protanopia
#131399 · ΔE00 6.8
deuteranopia
#232399 · ΔE00 7.9
tritanopia
#2f2f6a · ΔE00 12.6
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isViolet Hickey at ΔE00 2.653: between 2 and 5 — clearly two colours when compared, easily mistaken from memory. What the numbers mean.
- Violet HickeyΔE00 2.653 · #330099
- Full Swing IndigoΔE00 2.779 · #320094
- Grim PurpleΔE00 2.894 · #441188
- Pitch VioletΔE00 3.111 · #4a148c
- Aubergine PerlΔE00 3.35 · #5500aa
- Pixie PowderΔE00 3.459 · #391285
- MarionberryΔE00 3.483 · #380282
- Amarklor VioletΔE00 3.565 · #551199
- Sea GrapeΔE00 3.668 · #3300aa
- Indigo GirlsΔE00 3.739 · #4d0e88
- Indigo StaticΔE00 4.151 · #4b0183
- IndigoΔE00 4.33 · #4b0082
10 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.