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Recognised as Colour

#15519F

  • #15519F
  • Blue
  • Dark
  • Nearest: Dark slateblue

#15519F is a blue with RGB values 21, 81, 159 and HSL 214°, 77%, 35%. It is a dark colour, so white text on it reaches 7.8:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#15519F#15519F
HEX#15519F
RGBrgb(21, 81, 159)
RGB (0–1)0.0824, 0.3176, 0.6235
RGB percentages8.2%, 31.8%, 62.4%
HSLhsl(213.9, 76.7%, 35.3%)
HSV / HSBhsv(213.9, 86.8%, 62.4%)
CMYK86.8%, 49.1%, 0%, 37.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,397,151
CSS custom property--colour: #15519F;

Brightness & contrast

Relative luminance0.08547WCAG 2.x, 0 is black and 1 is white
Perceived brightness82.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.75:1
Contrast with white7.75:1WCAG normal text: AAA
Contrast with black2.71:1WCAG normal text: Fail
Greyscale equivalent#4A4A4A
Inverted#EAAE60

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#2359A2no red cones; affects about 1% of men; ΔE 5 from the original
Deuteranopia#004D9Dno green cones; the most common form, about 1% of men; ΔE 2.3 from the original
Tritanopia#006470no blue cones; rare, and affects men and women equally; ΔE 46.5 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text7.75:1WCAG large text: AAA
Contrast with black, large text2.71:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 15.8Royal blue · ΔE 26.2Cornflower blue · ΔE 27Midnight blue · ΔE 27.7Steel blue · ΔE 28.1Slate blue · ΔE 28.2
Nearest named CSS colourDark slateblue (#483D8B)ΔE 15.78, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#9F6315
Analogous#15969F, #1E159F
Triadic#9F1551, #519F15
Split complementary#9F1E15, #969F15
Tetradic#9F1596, #9F6315, #159F1E

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#90BAF0
Lighter +30%#639EEA
Lighter +20%#3682E4
Lighter +10%#1B68CC
Darker −10%#0F3A72
Darker −20%#092345
Darker −30%#030C18
Darker −40%#000000
More saturated +25%#004EB4
Less saturated −25%#2C5489

Channel breakdown

R21
G81
B159
Red21 (8.2%)
Green81 (31.8%)
Blue159 (62.4%)
Hue213.91°
Saturation (HSL)76.67%
Lightness35.29%
Dominant channelBlue
Hex per channelR 15 · G 51 · B 9F

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Every value on this page was computed from “15519f” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.