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Recognised as Colour

#639FFF

  • #639FFF
  • Blue
  • Dark
  • Nearest: Cornflower blue

#639FFF is a blue with RGB values 99, 159, 255 and HSL 217°, 100%, 69%. It is a dark colour, so black text on it reaches 7.9:1 contrast (AAA for normal text). The nearest named colour is Cornflower blue.

Colour values

#639FFF#639FFF
HEX#639FFF
RGBrgb(99, 159, 255)
RGB (0–1)0.3882, 0.6235, 1
RGB percentages38.8%, 62.4%, 100%
HSLhsl(216.9, 100%, 69.4%)
HSV / HSBhsv(216.9, 61.2%, 100%)
CMYK61.2%, 37.6%, 0%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,529,023
CSS custom property--colour: #639FFF;

Brightness & contrast

Relative luminance0.34669WCAG 2.x, 0 is black and 1 is white
Perceived brightness158.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 7.93:1
Contrast with white2.65:1WCAG normal text: Fail
Contrast with black7.93:1WCAG normal text: AAA
Greyscale equivalent#999999
Inverted#9C6000

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#75A7FFno red cones; affects about 1% of men; ΔE 5.8 from the original
Deuteranopia#6098FDno green cones; the most common form, about 1% of men; ΔE 4.3 from the original
Tritanopia#00B5C3no blue cones; rare, and affects men and women equally; ΔE 55 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text2.65:1WCAG large text: Fail
Contrast with black, large text7.93:1WCAG large text: AAA

Named colours

Cornflower blue · ΔE 5.5Dodgerblue · ΔE 11.6Royal blue · ΔE 27.3Steel blue · ΔE 28.3Medium purple · ΔE 29.8Deep skyblue · ΔE 29.8
Nearest named CSS colourCornflower blue (#6495ED)ΔE 5.53, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FFC363
Analogous#63EDFF, #7563FF
Triadic#FF639F, #9FFF63
Split complementary#FF7563, #EDFF63
Tetradic#FF63ED, #FFC363, #63FF75

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#FCFDFF
Lighter +20%#C9DEFF
Lighter +10%#96BEFF
Darker −10%#3080FF
Darker −20%#0061FC
Darker −30%#004DC9
Darker −40%#003A96
More saturated +25%#639FFF
Less saturated −25%#76A4EC

Channel breakdown

R99
G159
B255
Red99 (38.8%)
Green159 (62.4%)
Blue255 (100%)
Hue216.92°
Saturation (HSL)100%
Lightness69.41%
Dominant channelBlue
Hex per channelR 63 · G 9F · B FF

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Every value on this page was computed from “639fff” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.