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Recognised as Colour

#644CC7

  • #644CC7
  • Blue
  • Dark
  • Nearest: Slate blue

#644CC7 is a blue with RGB values 100, 76, 199 and HSL 252°, 52%, 54%. It is a dark colour, so white text on it reaches 6.2:1 contrast (AA for normal text). The nearest named colour is Slate blue.

Colour values

#644CC7#644CC7
HEX#644CC7
RGBrgb(100, 76, 199)
RGB (0–1)0.3922, 0.298, 0.7804
RGB percentages39.2%, 29.8%, 78%
HSLhsl(251.7, 52.3%, 53.9%)
HSV / HSBhsv(251.7, 61.8%, 78%)
CMYK49.7%, 61.8%, 0%, 22%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,573,255
CSS custom property--colour: #644CC7;

Brightness & contrast

Relative luminance0.12002WCAG 2.x, 0 is black and 1 is white
Perceived brightness104.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 6.18:1
Contrast with white6.18:1WCAG normal text: AA
Contrast with black3.4:1WCAG normal text: Fail
Greyscale equivalent#5A5A5A
Inverted#9BB338

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0064CBno red cones; affects about 1% of men; ΔE 25.2 from the original
Deuteranopia#005EC4no green cones; the most common form, about 1% of men; ΔE 24 from the original
Tritanopia#416982no blue cones; rare, and affects men and women equally; ΔE 64.3 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text6.18:1WCAG large text: AAA
Contrast with black, large text3.4:1WCAG large text: AA

Named colours

Slate blue · ΔE 7.4Medium slateblue · ΔE 11.8Rebecca purple · ΔE 16.2Royal blue · ΔE 17Medium purple · ΔE 18.1Dark orchid · ΔE 24
Nearest named CSS colourSlate blue (#6A5ACD)ΔE 7.4, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#AFC74C
Analogous#4C71C7, #A24CC7
Triadic#C7644C, #4CC764
Split complementary#C7A24C, #71C74C
Tetradic#C74C71, #AFC74C, #4CC7A2

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#EBE7F8
Lighter +30%#C9C1EB
Lighter +20%#A79ADF
Lighter +10%#8673D3
Darker −10%#4C35AB
Darker −20%#3B2984
Darker −30%#2A1D5D
Darker −40%#181136
More saturated +25%#522FE4
Less saturated −25%#7669AA

Channel breakdown

R100
G76
B199
Red100 (39.2%)
Green76 (29.8%)
Blue199 (78%)
Hue251.71°
Saturation (HSL)52.34%
Lightness53.92%
Dominant channelBlue
Hex per channelR 64 · G 4C · B C7

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Every value on this page was computed from “644cc7” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.