Sapphire Splendour
#2425b9
A blue that is saturated. It is dark — it carries white text and needs care with black.
Hex
#2425b9
RGB
36, 37, 185
OKLCh
39.5% 0.220 270.2°
CIELAB (D50)
25.7, 41.9, -78.1
What is true of this colour, and of no other
- 2 other named colours sit within ΔE00 2 of it.
- It uses 85% 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 92.5; on black, Lc -9.9. 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
10.29:1 — passes AA
Black text
2.04:1 — fails AA
White text is the better of the two at10.29:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#2425b9
protanopia
#2525b9 · ΔE00 0.1
deuteranopia
#2525b9 · ΔE00 0.1
tritanopia
#2525b9 · ΔE00 0.1
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isTetraammine at ΔE00 1.684: between 1 and 2 — a trained eye spots it when the two touch; nobody spots it across a room. What the numbers mean.
- TetraammineΔE00 1.684 · #1e20c7
- Underwater FallingΔE00 1.779 · #0022bb
- Arcade GlowΔE00 2.353 · #0022cc
- Lapis on NeptuneΔE00 2.791 · #1f22d2
- City Hunter BlueΔE00 2.99 · #0022aa
- VesperΔE00 3.446 · #0011cc
- True BlueΔE00 3.612 · #010fcc
- Too Dark TonightΔE00 3.614 · #0011bb
- Blue DepressionΔE00 3.847 · #4428bc
- Galactic HighwayΔE00 3.903 · #3311bb
- Brutally BlueΔE00 3.929 · #0022dd
- Dark GalaxyΔE00 3.998 · #0018a8
6 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.