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Recognised as Colour

#A3D9FF

  • #A3D9FF
  • Blue
  • Light
  • Nearest: Light skyblue

#A3D9FF is a blue with RGB values 163, 217, 255 and HSL 205°, 100%, 82%. It is a light colour, so black text on it reaches 13.9:1 contrast (AAA for normal text). The nearest named colour is Light skyblue.

Colour values

#A3D9FF#A3D9FF
HEX#A3D9FF
RGBrgb(163, 217, 255)
RGB (0–1)0.6392, 0.851, 1
RGB percentages63.9%, 85.1%, 100%
HSLhsl(204.8, 100%, 82%)
HSV / HSBhsv(204.8, 36.1%, 100%)
CMYK36.1%, 14.9%, 0%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer10,738,175
CSS custom property--colour: #A3D9FF;

Brightness & contrast

Relative luminance0.64632WCAG 2.x, 0 is black and 1 is white
Perceived brightness207.4 of 255ITU-R BT.601 weighting
Light or darkLight
Best text colour on this backgroundBlackcontrast 13.93:1
Contrast with white1.51:1WCAG normal text: Fail
Contrast with black13.93:1WCAG normal text: AAA
Greyscale equivalent#D0D0D0
Inverted#5C2600

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#C9D8FFno red cones; affects about 1% of men; ΔE 12 from the original
Deuteranopia#BCCEFEno green cones; the most common form, about 1% of men; ΔE 12.7 from the original
Tritanopia#83E3E5no blue cones; rare, and affects men and women equally; ΔE 24.2 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text1.51:1WCAG large text: Fail
Contrast with black, large text13.93:1WCAG large text: AAA

Named colours

Light skyblue · ΔE 6.9Sky blue · ΔE 8.7Light steelblue · ΔE 12.7Light blue · ΔE 12.9Powder blue · ΔE 17.2Lavender · ΔE 20.2
Nearest named CSS colourLight skyblue (#87CEFA)ΔE 6.87, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FFC9A3
Analogous#A3FFF7, #A3ABFF
Triadic#FFA3D9, #D9FFA3
Split complementary#FFA3AB, #FFF7A3
Tetradic#F7A3FF, #FFC9A3, #ABFFA3

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#FFFFFF
Lighter +20%#FFFFFF
Lighter +10%#D6EEFF
Darker −10%#70C4FF
Darker −20%#3DAFFF
Darker −30%#0A9AFF
Darker −40%#007ED6
More saturated +25%#A3D9FF
Less saturated −25%#AFD7F4

Channel breakdown

R163
G217
B255
Red163 (63.9%)
Green217 (85.1%)
Blue255 (100%)
Hue204.78°
Saturation (HSL)100%
Lightness81.96%
Dominant channelBlue
Hex per channelR A3 · G D9 · B FF

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Every value on this page was computed from “a3d9ff” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.