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Recognised as Colour

#64B4FF

  • #64B4FF
  • Blue
  • Dark
  • Nearest: Deep skyblue

#64B4FF is a blue with RGB values 100, 180, 255 and HSL 209°, 100%, 70%. It is a dark colour, so black text on it reaches 9.5:1 contrast (AAA for normal text). The nearest named colour is Deep skyblue.

Colour values

#64B4FF#64B4FF
HEX#64B4FF
RGBrgb(100, 180, 255)
RGB (0–1)0.3922, 0.7059, 1
RGB percentages39.2%, 70.6%, 100%
HSLhsl(209, 100%, 69.6%)
HSV / HSBhsv(209, 60.8%, 100%)
CMYK60.8%, 29.4%, 0%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,599,935
CSS custom property--colour: #64B4FF;

Brightness & contrast

Relative luminance0.42572WCAG 2.x, 0 is black and 1 is white
Perceived brightness171.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 9.51:1
Contrast with white2.21:1WCAG normal text: Fail
Contrast with black9.51:1WCAG normal text: AAA
Greyscale equivalent#A8A8A8
Inverted#9B4B00

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#94B7FFno red cones; affects about 1% of men; ΔE 10.6 from the original
Deuteranopia#7FA8FEno green cones; the most common form, about 1% of men; ΔE 12.3 from the original
Tritanopia#00C6CEno blue cones; rare, and affects men and women equally; ΔE 45.1 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text2.21:1WCAG large text: Fail
Contrast with black, large text9.51:1WCAG large text: AAA

Named colours

Deep skyblue · ΔE 15.2Cornflower blue · ΔE 15.9Light skyblue · ΔE 19.8Steel blue · ΔE 22.5Dodgerblue · ΔE 25.7Sky blue · ΔE 27.4
Nearest named CSS colourDeep skyblue (#00BFFF)ΔE 15.21, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FFAF64
Analogous#64FFFC, #6467FF
Triadic#FF64B4, #B4FF64
Split complementary#FF6467, #FFFC64
Tetradic#FC64FF, #FFAF64, #67FF64

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#FDFEFF
Lighter +20%#CAE5FF
Lighter +10%#97CDFF
Darker −10%#319BFF
Darker −20%#0083FD
Darker −30%#0068CA
Darker −40%#004E97
More saturated +25%#64B4FF
Less saturated −25%#77B3EC

Channel breakdown

R100
G180
B255
Red100 (39.2%)
Green180 (70.6%)
Blue255 (100%)
Hue209.03°
Saturation (HSL)100%
Lightness69.61%
Dominant channelBlue
Hex per channelR 64 · G B4 · B FF

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Every value on this page was computed from “64b4ff” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.