Star of Life
#057bc1
A blue that is muted. It is mid — the hardest range to put text on, either colour struggles.
Hex
#057bc1
RGB
5, 123, 193
OKLCh
56.3% 0.140 244.9°
CIELAB (D50)
48.8, -8.7, -45.3
What is true of this colour, and of no other
- 11 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 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 71.0; on black, Lc -30.7. 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 18.0 and 17.5 and 17.6 — no red cone.
Text on this colour
White text
4.56:1 — passes AA
Black text
4.61:1 — passes AA
Black text is the better of the two at4.61:1. That is enough for body text.
The same colour, with one cone missing
As you see it
#057bc1
protanopia
#7474c1 · ΔE00 18.0
deuteranopia
#6969c2 · ΔE00 17.5
tritanopia
#5a5aff · ΔE00 17.6
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isSwedish Blue at ΔE00 0.628: below 1.0 — an ordinary observer cannot tell these apart, even side by side. What the numbers mean.
- Swedish BlueΔE00 0.628 · #007cc0
- Diva BlueΔE00 0.802 · #0079c1
- Roller Coaster ChariotΔE00 1.129 · #0078be
- SkyllaΔE00 1.168 · #1f7cc2
- Blue AsterΔE00 1.221 · #007ec7
- Deep CeruleanΔE00 1.288 · #007bbb
- Haddock’s SweaterΔE00 1.417 · #277aba
- Ocean Boat BlueΔE00 1.504 · #0077be
- Bumangués BlueΔE00 1.512 · #0777bc
- Amalfi CoastΔE00 1.629 · #297cbf
- Star Command BlueΔE00 1.932 · #007bb8
- Honolulu BlueΔE00 2.02 · #007fbf
10 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.