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Recognised as Colour

#15316B

  • #15316B
  • Blue
  • Dark
  • Nearest: Dark slateblue

#15316B is a blue with RGB values 21, 49, 107 and HSL 220°, 67%, 25%. It is a dark colour, so white text on it reaches 12.5:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#15316B#15316B
HEX#15316B
RGBrgb(21, 49, 107)
RGB (0–1)0.0824, 0.1922, 0.4196
RGB percentages8.2%, 19.2%, 42%
HSLhsl(220.5, 67.2%, 25.1%)
HSV / HSBhsv(220.5, 80.4%, 42%)
CMYK80.4%, 54.2%, 0%, 58%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,388,907
CSS custom property--colour: #15316B;

Brightness & contrast

Relative luminance0.03418WCAG 2.x, 0 is black and 1 is white
Perceived brightness53.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 12.47:1
Contrast with white12.47:1WCAG normal text: AAA
Contrast with black1.68:1WCAG normal text: Fail
Greyscale equivalent#2F2F2F
Inverted#EACE94

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0B386Dno red cones; affects about 1% of men; ΔE 6 from the original
Deuteranopia#00306Ano green cones; the most common form, about 1% of men; ΔE 2.2 from the original
Tritanopia#003F49no blue cones; rare, and affects men and women equally; ΔE 36.9 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text12.47:1WCAG large text: AAA
Contrast with black, large text1.68:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 17.1Midnight blue · ΔE 23.7Rebecca purple · ΔE 34Steel blue · ΔE 35.3Slate blue · ΔE 39.4Royal blue · ΔE 41
Nearest named CSS colourDark slateblue (#483D8B)ΔE 17.15, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#6B4F15
Analogous#155C6B, #24156B
Triadic#6B1531, #316B15
Split complementary#6B2415, #5C6B15
Tetradic#6B155C, #6B4F15, #156B24

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#6A91E2
Lighter +30%#4072D9
Lighter +20%#2658C0
Lighter +10%#1D4596
Darker −10%#0D1D40
Darker −20%#040A16
Darker −30%#000000
Darker −40%#000000
More saturated +25%#052B7B
Less saturated −25%#25375B

Channel breakdown

R21
G49
B107
Red21 (8.2%)
Green49 (19.2%)
Blue107 (42%)
Hue220.47°
Saturation (HSL)67.19%
Lightness25.1%
Dominant channelBlue
Hex per channelR 15 · G 31 · B 6B

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Every value on this page was computed from “15316b” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.