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Recognised as Colour

#5151D2

  • #5151D2
  • Blue
  • Dark
  • Nearest: Slate blue

#5151D2 is a blue with RGB values 81, 81, 210 and HSL 240°, 59%, 57%. It is a dark colour, so white text on it reaches 6.1:1 contrast (AA for normal text). The nearest named colour is Slate blue.

Colour values

#5151D2#5151D2
HEX#5151D2
RGBrgb(81, 81, 210)
RGB (0–1)0.3176, 0.3176, 0.8235
RGB percentages31.8%, 31.8%, 82.4%
HSLhsl(240, 58.9%, 57.1%)
HSV / HSBhsv(240, 61.4%, 82.4%)
CMYK61.4%, 61.4%, 0%, 17.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,329,362
CSS custom property--colour: #5151D2;

Brightness & contrast

Relative luminance0.12287WCAG 2.x, 0 is black and 1 is white
Perceived brightness104.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 6.07:1
Contrast with white6.07:1WCAG normal text: AA
Contrast with black3.46:1WCAG normal text: Fail
Greyscale equivalent#5A5A5A
Inverted#AEAE2D

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0068D6no red cones; affects about 1% of men; ΔE 21 from the original
Deuteranopia#005DCFno green cones; the most common form, about 1% of men; ΔE 16.1 from the original
Tritanopia#00718Ano blue cones; rare, and affects men and women equally; ΔE 72.1 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text6.07:1WCAG large text: AAA
Contrast with black, large text3.46:1WCAG large text: AA

Named colours

Slate blue · ΔE 9.9Medium slateblue · ΔE 10.9Royal blue · ΔE 13.7Medium purple · ΔE 21.3Rebecca purple · ΔE 21.9Dark orchid · ΔE 27.6
Nearest named CSS colourSlate blue (#6A5ACD)ΔE 9.92, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#D2D251
Analogous#5192D2, #9251D2
Triadic#D25151, #51D251
Split complementary#D29251, #92D251
Tetradic#D25192, #D2D251, #51D292

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#F3F3FC
Lighter +30%#CBCBF1
Lighter +20%#A2A2E7
Lighter +10%#7A7ADC
Darker −10%#3131BF
Darker −20%#272796
Darker −30%#1C1C6E
Darker −40%#121245
More saturated +25%#3636ED
Less saturated −25%#6C6CB7

Channel breakdown

R81
G81
B210
Red81 (31.8%)
Green81 (31.8%)
Blue210 (82.4%)
Hue240°
Saturation (HSL)58.9%
Lightness57.06%
Dominant channelBlue
Hex per channelR 51 · G 51 · B D2

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Every value on this page was computed from “5151d2” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.