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Recognised as Colour

#6563EE

  • #6563EE
  • Blue
  • Dark
  • Nearest: Medium slateblue

#6563EE is a blue with RGB values 101, 99, 238 and HSL 241°, 80%, 66%. It is a dark colour, so white text on it reaches 4.6:1 contrast (AA for normal text). The nearest named colour is Medium slateblue.

Colour values

#6563EE#6563EE
HEX#6563EE
RGBrgb(101, 99, 238)
RGB (0–1)0.3961, 0.3882, 0.9333
RGB percentages39.6%, 38.8%, 93.3%
HSLhsl(240.9, 80.3%, 66.1%)
HSV / HSBhsv(240.9, 58.4%, 93.3%)
CMYK57.6%, 58.4%, 0%, 6.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,644,718
CSS custom property--colour: #6563EE;

Brightness & contrast

Relative luminance0.17863WCAG 2.x, 0 is black and 1 is white
Perceived brightness123.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 4.59:1
Contrast with white4.59:1WCAG normal text: AA
Contrast with black4.57:1WCAG normal text: AA
Greyscale equivalent#6D6D6D
Inverted#9A9C11

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#007BF3no red cones; affects about 1% of men; ΔE 22.9 from the original
Deuteranopia#0070EBno green cones; the most common form, about 1% of men; ΔE 18.8 from the original
Tritanopia#03849Fno blue cones; rare, and affects men and women equally; ΔE 76.3 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text4.59:1WCAG large text: AAA
Contrast with black, large text4.57:1WCAG large text: AAA

Named colours

Medium slateblue · ΔE 5.6Slate blue · ΔE 13.5Royal blue · ΔE 14.5Medium purple · ΔE 21Dark orchid · ΔE 27.8Rebecca purple · ΔE 28.3
Nearest named CSS colourMedium slateblue (#7B68EE)ΔE 5.58, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#ECEE63
Analogous#63A7EE, #AA63EE
Triadic#EE6563, #63EE65
Split complementary#EEAA63, #A7EE63
Tetradic#EE63A7, #ECEE63, #63EEAA

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#FFFFFF
Lighter +30%#EDEDFD
Lighter +20%#C0BFF8
Lighter +10%#9291F3
Darker −10%#3835E9
Darker −20%#1A17D4
Darker −30%#1412A6
Darker −40%#0F0D78
More saturated +25%#5452FF
Less saturated −25%#7A79D8

Channel breakdown

R101
G99
B238
Red101 (39.6%)
Green99 (38.8%)
Blue238 (93.3%)
Hue240.86°
Saturation (HSL)80.35%
Lightness66.08%
Dominant channelBlue
Hex per channelR 65 · G 63 · B EE

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Every value on this page was computed from “6563ee” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.