Blue Bikini
#00bbee
A cyan that is muted. It is light — black text sits on it comfortably, white text does not.
Hex
#00bbee
RGB
0, 187, 238
OKLCh
73.8% 0.141 226.3°
CIELAB (D50)
70.0, -27.0, -37.2
What is true of this colour, and of no other
- One other named colour sits within ΔE00 2 of it.
- 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 43.6; on black, Lc -58.6. 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 25.8 and 25.3 and 26.2 — no red cone.
Text on this colour
White text
2.25:1 — fails AA
Black text
9.34:1 — passes AA
Black text is the better of the two at9.34:1. That is enough for body text.
As text on white, it needs to change
#0081a5 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.
The same colour, with one cone missing
As you see it
#00bbee
protanopia
#b1b1ee · ΔE00 25.8
deuteranopia
#a0a0ef · ΔE00 25.3
tritanopia
#8989ff · ΔE00 26.2
The twelve nearest named colours
Ranked by CIEDE2000 — perceptual distance, not hex arithmetic. The closest isCyanite at ΔE00 1.136: between 1 and 2 — a trained eye spots it when the two touch; nobody spots it across a room. What the numbers mean.
- CyaniteΔE00 1.136 · #00b7eb
- Zima BlueΔE00 2.377 · #16b8f3
- Blue AtollΔE00 2.459 · #00b3e1
- Spiro Disco BallΔE00 2.557 · #0fc0fc
- Blue RaspberryΔE00 2.577 · #0cbfe9
- Clean PoolΔE00 2.919 · #4ec0ed
- Tractor BeamΔE00 2.987 · #00bffe
- Shovel KnightΔE00 3.018 · #37c4fa
- CapriΔE00 3.202 · #00bfff
- Summer SkyΔE00 3.294 · #38b0de
- Highlighter BlueΔE00 3.603 · #3aafdc
- Blue BoltΔE00 3.666 · #00b9fb
10 of these have no page of their own: pages exist for the 4,961 colours the dataset marks as good names.