Blue Chip
#1d5699
A blue that is muted. It is mid — the hardest range to put text on, either colour struggles.
Hex
#1d5699
RGB
29, 86, 153
OKLCh
45.3% 0.124 255.0°
CIELAB (D50)
35.7, 1.0, -42.7
What is true of this colour, and of no other
- 16 other named colours sit within ΔE00 2 of it — this part of the space is crowded, and the names here are finer distinctions than most people make.
- It uses 83% of the chroma sRGB can show at this lightness and hue.
- As text on white it measures APCA Lc 85.3; on black, Lc -16.8. 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 11.5 and 11.1 and 11.4 — no red cone.
Text on this colour
White text
7.39:1 — passes AA
Black text
2.84:1 — fails AA
White text is the better of the two at7.39:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#1d5699
protanopia
#525299 · ΔE00 11.5
deuteranopia
#4a4a99 · ΔE00 11.1
tritanopia
#4141c6 · ΔE00 11.4
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isSonic Blue at ΔE00 0.479: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.
- Sonic BlueΔE00 0.479 · #17569b
- Florentine LapisΔE00 0.519 · #1c5798
- Fist of the North StarΔE00 0.843 · #225599
- Suddenly SapphireΔE00 1.126 · #1a5897
- Cyan Cobalt BlueΔE00 1.393 · #28589c
- Summer WatersΔE00 1.421 · #215399
- Blue SailΔE00 1.446 · #24549a
- Princess BlueΔE00 1.478 · #0056a1
- Blue RegentΔE00 1.486 · #285991
- Raiden BlueΔE00 1.594 · #0056a8
- Victoria BlueΔE00 1.646 · #0853a7
- Blue LobsterΔE00 1.683 · #0055aa
11 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.