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Recognised as Colour

#638DEB

  • #638DEB
  • Blue
  • Dark
  • Nearest: Cornflower blue

#638DEB is a blue with RGB values 99, 141, 235 and HSL 221°, 77%, 65%. It is a dark colour, so black text on it reaches 6.5:1 contrast (AA for normal text). The nearest named colour is Cornflower blue.

Colour values

#638DEB#638DEB
HEX#638DEB
RGBrgb(99, 141, 235)
RGB (0–1)0.3882, 0.5529, 0.9216
RGB percentages38.8%, 55.3%, 92.2%
HSLhsl(221.5, 77.3%, 65.5%)
HSV / HSBhsv(221.5, 57.9%, 92.2%)
CMYK57.9%, 40%, 0%, 7.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,524,395
CSS custom property--colour: #638DEB;

Brightness & contrast

Relative luminance0.27701WCAG 2.x, 0 is black and 1 is white
Perceived brightness144.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 6.54:1
Contrast with white3.21:1WCAG normal text: Fail
Contrast with black6.54:1WCAG normal text: AA
Greyscale equivalent#8B8B8B
Inverted#9C7214

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#6596EFno red cones; affects about 1% of men; ΔE 5 from the original
Deuteranopia#538AE9no green cones; the most common form, about 1% of men; ΔE 2.9 from the original
Tritanopia#00A2B1no blue cones; rare, and affects men and women equally; ΔE 54.6 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text3.21:1WCAG large text: AA
Contrast with black, large text6.54:1WCAG large text: AAA

Named colours

Cornflower blue · ΔE 5.2Dodgerblue · ΔE 12Royal blue · ΔE 22.1Medium purple · ΔE 24.1Steel blue · ΔE 27.1Slate blue · ΔE 27.6
Nearest named CSS colourCornflower blue (#6495ED)ΔE 5.2, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#EBC163
Analogous#63D1EB, #7D63EB
Triadic#EB638D, #8DEB63
Split complementary#EB7D63, #D1EB63
Tetradic#EB63D1, #EBC163, #63EB7D

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#EBF0FC
Lighter +20%#BDCFF7
Lighter +10%#90AEF1
Darker −10%#366CE5
Darker −20%#1A52CE
Darker −30%#1540A0
Darker −40%#0F2E73
More saturated +25%#4F85FF
Less saturated −25%#7995D5

Channel breakdown

R99
G141
B235
Red99 (38.8%)
Green141 (55.3%)
Blue235 (92.2%)
Hue221.47°
Saturation (HSL)77.27%
Lightness65.49%
Dominant channelBlue
Hex per channelR 63 · G 8D · B EB

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Every value on this page was computed from “638deb” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.