HueComb

Caribbean Blue

#1ac1dd

A cyan that is muted. It is light — black text sits on it comfortably, white text does not.

Hex

#1ac1dd

RGB

26, 193, 221

OKLCh

74.7% 0.127 213.4°

CIELAB (D50)

71.4, -33.2, -25.8

What is true of this colour, and of no other

  • No other named colour in the set is within ΔE00 2 of it — it stands alone.
  • It uses 97% 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 41.9; on black, Lc -60.3. 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 26.6 and 26.8 and 29.0 — no red cone.

Text on this colour

White text

2.16:1 — fails AA

Black text

9.72:1 — passes AA

Black text is the better of the two at9.72:1. That is enough for body text.

As text on white, it needs to change

#008397 is the nearest colour of the same hue that passes AA on white, at 4.50:1. Only the lightness moved, and some saturation was given up to stay inside sRGB.

Try it against your own background

The same colour, with one cone missing

As you see it

#1ac1dd

protanopia

#b7b7dd · ΔE00 26.6

deuteranopia

#a6a6df · ΔE00 26.8

tritanopia

#8f8fff · ΔE00 29.0

Run a whole palette through all three

The twelve nearest named colours

Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isHoliday Blue at ΔE00 2.256: between 2 and 5 — clearly two colours when compared, easily mistaken from memory. What the numbers mean.

  • Holiday BlueΔE00 2.256 · #32bcd1
  • MaldivesΔE00 2.332 · #00bbdd
  • The Crowd Roars!ΔE00 2.345 · #22c1d5
  • Bachelor ButtonΔE00 2.686 · #4abbd5
  • Picnic Day SkyΔE00 3.112 · #00ccee
  • GlimpseΔE00 3.389 · #4fb9ce
  • Water SportsΔE00 3.441 · #44bbcc
  • Lake ThunΔE00 3.591 · #44bbdd
  • Naxos SkyΔE00 3.608 · #5dc2db
  • Teal MoiréΔE00 3.739 · #50b7cf
  • Ocean SighΔE00 3.796 · #34b5d5
  • Blue RaspberryΔE00 3.878 · #0cbfe9

12 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.