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Recognised as Colour

#51429B

  • #51429B
  • Blue
  • Dark
  • Nearest: Dark slateblue

#51429B is a blue with RGB values 81, 66, 155 and HSL 250°, 40%, 43%. It is a dark colour, so white text on it reaches 8.1:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#51429B#51429B
HEX#51429B
RGBrgb(81, 66, 155)
RGB (0–1)0.3176, 0.2588, 0.6078
RGB percentages31.8%, 25.9%, 60.8%
HSLhsl(250.1, 40.3%, 43.3%)
HSV / HSBhsv(250.1, 57.4%, 60.8%)
CMYK47.7%, 57.4%, 0%, 39.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,325,467
CSS custom property--colour: #51429B;

Brightness & contrast

Relative luminance0.08012WCAG 2.x, 0 is black and 1 is white
Perceived brightness85.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 8.07:1
Contrast with white8.07:1WCAG normal text: AAA
Contrast with black2.6:1WCAG normal text: Fail
Greyscale equivalent#4C4C4C
Inverted#AEBD64

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#09529Eno red cones; affects about 1% of men; ΔE 20 from the original
Deuteranopia#084E99no green cones; the most common form, about 1% of men; ΔE 19.4 from the original
Tritanopia#395668no blue cones; rare, and affects men and women equally; ΔE 48.4 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text8.07:1WCAG large text: AAA
Contrast with black, large text2.6:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 6.8Rebecca purple · ΔE 12.9Slate blue · ΔE 17Midnight blue · ΔE 18.5Medium purple · ΔE 22.3Royal blue · ΔE 23.4
Nearest named CSS colourDark slateblue (#483D8B)ΔE 6.85, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#8C9B42
Analogous#42609B, #7E429B
Triadic#9B5142, #429B51
Split complementary#9B7E42, #609B42
Tetradic#9B4260, #8C9B42, #429B7D

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#C9C3E6
Lighter +30%#A9A0D6
Lighter +20%#897CC7
Lighter +10%#6858B8
Darker −10%#3E3377
Darker −20%#2C2453
Darker −30%#191430
Darker −40%#06050C
More saturated +25%#3F26B7
Less saturated −25%#635E7F

Channel breakdown

R81
G66
B155
Red81 (31.8%)
Green66 (25.9%)
Blue155 (60.8%)
Hue250.11°
Saturation (HSL)40.27%
Lightness43.33%
Dominant channelBlue
Hex per channelR 51 · G 42 · B 9B

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Every value on this page was computed from “51429b” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.