Too Dark Tonight
#0011bb
A blue that is about as vivid as sRGB can show at this lightness. It is dark — it carries white text and needs care with black.
Hex
#0011bb
RGB
0, 17, 187
OKLCh
36.7% 0.242 264.2°
CIELAB (D50)
21.6, 49.6, -86.2
What is true of this colour, and of no other
- 3 other named colours sit within ΔE00 2 of it.
- It uses 95% of the chroma sRGB can show at this lightness and hue — close enough to the boundary that a wider display would show it slightly more vividly.
- As text on white it measures APCA Lc 94.3; on black, Lc -8.2. 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
11.68:1 — passes AA
Black text
1.80:1 — fails AA
White text is the better of the two at11.68:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#0011bb
protanopia
#0f0fbb · ΔE00 0.6
deuteranopia
#0d0dbb · ΔE00 0.7
tritanopia
#0909be · ΔE00 0.9
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isKeese Blue at ΔE00 1.752: between 1 and 2 — a trained eye spots it when the two touch; nobody spots it across a room. What the numbers mean.
- Keese BlueΔE00 1.752 · #0000bc
- Antarctic CircleΔE00 1.796 · #0000bb
- True BlueΔE00 1.979 · #010fcc
- VesperΔE00 2.031 · #0011cc
- Extravehicular ActivityΔE00 2.073 · #0011aa
- Lady of the SeaΔE00 2.14 · #0000cc
- Medium BlueΔE00 2.218 · #0000cd
- ZaffreΔE00 2.259 · #0014a8
- Evil EyeΔE00 2.339 · #1100cc
- Dark GalaxyΔE00 2.366 · #0018a8
- CobaltΔE00 2.799 · #030aa7
- Deep Sea ExplorationΔE00 2.865 · #2000b1
9 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.