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Recognised as Colour

#63B4FF

  • #63B4FF
  • Blue
  • Dark
  • Nearest: Deep skyblue

#63B4FF is a blue with RGB values 99, 180, 255 and HSL 209°, 100%, 69%. 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

#63B4FF#63B4FF
HEX#63B4FF
RGBrgb(99, 180, 255)
RGB (0–1)0.3882, 0.7059, 1
RGB percentages38.8%, 70.6%, 100%
HSLhsl(208.8, 100%, 69.4%)
HSV / HSBhsv(208.8, 61.2%, 100%)
CMYK61.2%, 29.4%, 0%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,534,399
CSS custom property--colour: #63B4FF;

Brightness & contrast

Relative luminance0.42515WCAG 2.x, 0 is black and 1 is white
Perceived brightness171.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 9.5:1
Contrast with white2.21:1WCAG normal text: Fail
Contrast with black9.5:1WCAG normal text: AAA
Greyscale equivalent#A8A8A8
Inverted#9C4B00

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#94B7FFno red cones; affects about 1% of men; ΔE 10.8 from the original
Deuteranopia#7FA8FEno green cones; the most common form, about 1% of men; ΔE 12.5 from the original
Tritanopia#00C6CEno blue cones; rare, and affects men and women equally; ΔE 45 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 text9.5:1WCAG large text: AAA

Named colours

Deep skyblue · ΔE 15Cornflower blue · ΔE 16Light skyblue · ΔE 19.8Steel blue · ΔE 22.5Dodgerblue · ΔE 25.7Sky blue · ΔE 27.3
Nearest named CSS colourDeep skyblue (#00BFFF)ΔE 15.04, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FFAE63
Analogous#63FFFC, #6366FF
Triadic#FF63B4, #B4FF63
Split complementary#FF6366, #FFFC63
Tetradic#FC63FF, #FFAE63, #66FF63

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#FCFEFF
Lighter +20%#C9E5FF
Lighter +10%#96CDFF
Darker −10%#309BFF
Darker −20%#0083FC
Darker −30%#0068C9
Darker −40%#004E96
More saturated +25%#63B4FF
Less saturated −25%#76B3EC

Channel breakdown

R99
G180
B255
Red99 (38.8%)
Green180 (70.6%)
Blue255 (100%)
Hue208.85°
Saturation (HSL)100%
Lightness69.41%
Dominant channelBlue
Hex per channelR 63 · G B4 · B FF

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Every value on this page was computed from “63b4ff” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.