Sapphire Glitter
#0033cc
A blue that is about as vivid as sRGB can show at this lightness. It is mid — the hardest range to put text on, either colour struggles.
Hex
#0033cc
RGB
0, 51, 204
OKLCh
42.6% 0.235 263.7°
CIELAB (D50)
29.5, 38.1, -83.1
What is true of this colour, and of no other
- One other named colour sits 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 89.0; on black, Lc -13.2. 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.
- All three dichromacies see it as very nearly the same colour you do: its hue is not the part carrying its identity.
Text on this colour
White text
8.95:1 — passes AA
Black text
2.35:1 — fails AA
White text is the better of the two at8.95:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#0033cc
protanopia
#3030cc · ΔE00 3.1
deuteranopia
#2a2acc · ΔE00 3.5
tritanopia
#2323da · ΔE00 4.4
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isCold Pack at ΔE00 1.949: between 1 and 2 — a trained eye spots it when the two touch; nobody spots it across a room. What the numbers mean.
- Cold PackΔE00 1.949 · #0033dd
- Blue Screen of DeathΔE00 2.001 · #0033bb
- Blue MurderΔE00 2.139 · #2539bf
- Persian BlueΔE00 2.254 · #1c39bb
- Third Eye ChakraΔE00 2.355 · #243bcd
- Blue Cardinal FlowerΔE00 2.996 · #2f36ba
- Yuè Guāng Lán BlueΔE00 3.792 · #2138ab
- Blue BouquetΔE00 3.858 · #0033ee
- Blue HourΔE00 3.957 · #0034ab
- Brutally BlueΔE00 3.982 · #0022dd
- Blue BlueΔE00 3.993 · #2242c7
- Arcade GlowΔE00 4 · #0022cc
9 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.