Pure Blue
#0203e2
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
#0203e2
RGB
2, 3, 226
OKLCh
41.4% 0.285 264.2°
CIELAB (D50)
25.8, 61.8, -101.9
What is true of this colour, and of no other
- 5 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 89.7; on black, Lc -12.6. 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
9.93:1 — passes AA
Black text
2.11:1 — fails AA
White text is the better of the two at9.93:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#0203e2
protanopia
#0303e2 · ΔE00 0.0
deuteranopia
#0303e2 · ΔE00 0.0
tritanopia
#0303e2 · ΔE00 0.0
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isBluealicious at ΔE00 0.745: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.
- BluealiciousΔE00 0.745 · #0000dd
- UltramarineΔE00 0.802 · #1805db
- Nightfall in SuburbiaΔE00 1.042 · #0011dd
- Hyperlink BlueΔE00 1.321 · #0000ee
- Burning UltrablueΔE00 1.686 · #150aec
- Midsummer NightsΔE00 2.123 · #0011ee
- Star of DavidΔE00 2.382 · #0000f7
- True BlueΔE00 2.389 · #010fcc
- VesperΔE00 2.405 · #0011cc
- Medium BlueΔE00 2.651 · #0000cd
- Evil EyeΔE00 2.656 · #1100cc
- Strong BlueΔE00 2.676 · #0c06f7
8 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.