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Recognised as Colour

#4247C4

  • #4247C4
  • Blue
  • Dark
  • Nearest: Slate blue

#4247C4 is a blue with RGB values 66, 71, 196 and HSL 238°, 52%, 51%. It is a dark colour, so white text on it reaches 7.2:1 contrast (AAA for normal text). The nearest named colour is Slate blue.

Colour values

#4247C4#4247C4
HEX#4247C4
RGBrgb(66, 71, 196)
RGB (0–1)0.2588, 0.2784, 0.7686
RGB percentages25.9%, 27.8%, 76.9%
HSLhsl(237.7, 52.4%, 51.4%)
HSV / HSBhsv(237.7, 66.3%, 76.9%)
CMYK66.3%, 63.8%, 0%, 23.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,343,748
CSS custom property--colour: #4247C4;

Brightness & contrast

Relative luminance0.0965WCAG 2.x, 0 is black and 1 is white
Perceived brightness93 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.17:1
Contrast with white7.17:1WCAG normal text: AAA
Contrast with black2.93:1WCAG normal text: Fail
Greyscale equivalent#4F4F4F
Inverted#BDB83B

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#005DC8no red cones; affects about 1% of men; ΔE 18.9 from the original
Deuteranopia#0052C2no green cones; the most common form, about 1% of men; ΔE 13.3 from the original
Tritanopia#00677Fno blue cones; rare, and affects men and women equally; ΔE 70.4 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text7.17:1WCAG large text: AAA
Contrast with black, large text2.93:1WCAG large text: Fail

Named colours

Slate blue · ΔE 11.6Medium slateblue · ΔE 15.4Royal blue · ΔE 15.5Rebecca purple · ΔE 20Medium purple · ΔE 23.8Indigo · ΔE 25.2
Nearest named CSS colourSlate blue (#6A5ACD)ΔE 11.6, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#C4BF42
Analogous#4288C4, #7E42C4
Triadic#C44247, #47C442
Split complementary#C47E42, #88C442
Tetradic#C44288, #C4BF42, #42C47E

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#DDDEF5
Lighter +30%#B7B9E8
Lighter +20%#9093DC
Lighter +10%#696DD0
Darker −10%#3236A1
Darker −20%#26297A
Darker −30%#1A1C53
Darker −40%#0E0F2C
More saturated +25%#232AE3
Less saturated −25%#6164A5

Channel breakdown

R66
G71
B196
Red66 (25.9%)
Green71 (27.8%)
Blue196 (76.9%)
Hue237.69°
Saturation (HSL)52.42%
Lightness51.37%
Dominant channelBlue
Hex per channelR 42 · G 47 · B C4

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Every value on this page was computed from “4247c4” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.