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Recognised as Colour

#51579A

  • #51579A
  • Blue
  • Dark
  • Nearest: Dark slateblue

#51579A is a blue with RGB values 81, 87, 154 and HSL 235°, 31%, 46%. It is a dark colour, so white text on it reaches 6.6:1 contrast (AA for normal text). The nearest named colour is Dark slateblue.

Colour values

#51579A#51579A
HEX#51579A
RGBrgb(81, 87, 154)
RGB (0–1)0.3176, 0.3412, 0.6039
RGB percentages31.8%, 34.1%, 60.4%
HSLhsl(235.1, 31.1%, 46.1%)
HSV / HSBhsv(235.1, 47.4%, 60.4%)
CMYK47.4%, 43.5%, 0%, 39.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,330,842
CSS custom property--colour: #51579A;

Brightness & contrast

Relative luminance0.10899WCAG 2.x, 0 is black and 1 is white
Perceived brightness95.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 6.6:1
Contrast with white6.6:1WCAG normal text: AA
Contrast with black3.18:1WCAG normal text: Fail
Greyscale equivalent#5B5B5B
Inverted#AEA865

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#3D609Dno red cones; affects about 1% of men; ΔE 9.5 from the original
Deuteranopia#375A98no green cones; the most common form, about 1% of men; ΔE 8.5 from the original
Tritanopia#376571no blue cones; rare, and affects men and women equally; ΔE 38.5 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text6.6:1WCAG large text: AAA
Contrast with black, large text3.18:1WCAG large text: AA

Named colours

Dark slateblue · ΔE 13.8Steel blue · ΔE 24.8Cornflower blue · ΔE 26.4Medium purple · ΔE 28.7Slate blue · ΔE 28.9Rebecca purple · ΔE 29
Nearest named CSS colourDark slateblue (#483D8B)ΔE 13.77, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#9A9451
Analogous#517C9A, #6F519A
Triadic#9A5157, #579A51
Split complementary#9A6F51, #7C9A51
Tetradic#9A517C, #9A9451, #519A6F

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#D0D2E7
Lighter +30%#AFB2D5
Lighter +20%#8E92C3
Lighter +10%#6C72B2
Darker −10%#3F4479
Darker −20%#2E3157
Darker −30%#1C1E36
Darker −40%#0B0B14
More saturated +25%#343EB7
Less saturated −25%#6E707D

Channel breakdown

R81
G87
B154
Red81 (31.8%)
Green87 (34.1%)
Blue154 (60.4%)
Hue235.07°
Saturation (HSL)31.06%
Lightness46.08%
Dominant channelBlue
Hex per channelR 51 · G 57 · B 9A

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Every value on this page was computed from “51579a” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.