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Colour

#15509A

  • #15509A
  • Blue
  • Dark
  • Nearest: Dark slateblue

#15509A is a blue with RGB values 21, 80, 154 and HSL 213°, 76%, 34%. It is a dark colour, so white text on it reaches 7.9:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#15509A#15509A
HEX#15509A
RGBrgb(21, 80, 154)
RGB (0–1)0.0824, 0.3137, 0.6039
RGB percentages8.2%, 31.4%, 60.4%
HSLhsl(213.4, 76%, 34.3%)
HSV / HSBhsv(213.4, 86.4%, 60.4%)
CMYK86.4%, 48.1%, 0%, 39.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,396,890
CSS custom property--colour: #15509A;

Brightness & contrast

Relative luminance0.0823WCAG 2.x, 0 is black and 1 is white
Perceived brightness81.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.94:1
Contrast with white7.94:1WCAG normal text: AAA
Contrast with black2.65:1WCAG normal text: Fail
Greyscale equivalent#494949
Inverted#EAAF65

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#26579Dno red cones; affects about 1% of men; ΔE 4.2 from the original
Deuteranopia#004C99no green cones; the most common form, about 1% of men; ΔE 2.8 from the original
Tritanopia#00626Dno blue cones; rare, and affects men and women equally; ΔE 44.6 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text7.94:1WCAG large text: AAA
Contrast with black, large text2.65:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 16.3Steel blue · ΔE 26.7Cornflower blue · ΔE 27.8Midnight blue · ΔE 28.5Royal blue · ΔE 28.6Slate blue · ΔE 30.3
Nearest named CSS colourDark slateblue (#483D8B)ΔE 16.35, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#9A5F15
Analogous#15939A, #1D159A
Triadic#9A1550, #509A15
Split complementary#9A1C15, #939A15
Tetradic#9A1593, #9A5F15, #159A1C

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#8CB8EF
Lighter +30%#5F9CE9
Lighter +20%#3281E3
Lighter +10%#1B67C7
Darker −10%#0F396D
Darker −20%#092140
Darker −30%#030A13
Darker −40%#000000
More saturated +25%#004EAF
Less saturated −25%#2B5284

Channel breakdown

R21
G80
B154
Red21 (8.2%)
Green80 (31.4%)
Blue154 (60.4%)
Hue213.38°
Saturation (HSL)76%
Lightness34.31%
Dominant channelBlue
Hex per channelR 15 · G 50 · B 9A

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Every value on this page was computed from “15509a” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.