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Recognised as Colour

#17315C

  • #17315C
  • Blue
  • Dark
  • Nearest: Dark slateblue

#17315C is a blue with RGB values 23, 49, 92 and HSL 217°, 60%, 23%. It is a dark colour, so white text on it reaches 12.9:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#17315C#17315C
HEX#17315C
RGBrgb(23, 49, 92)
RGB (0–1)0.0902, 0.1922, 0.3608
RGB percentages9%, 19.2%, 36.1%
HSLhsl(217.4, 60%, 22.5%)
HSV / HSBhsv(217.4, 75%, 36.1%)
CMYK75%, 46.7%, 0%, 63.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,519,964
CSS custom property--colour: #17315C;

Brightness & contrast

Relative luminance0.03151WCAG 2.x, 0 is black and 1 is white
Perceived brightness50.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 12.88:1
Contrast with white12.88:1WCAG normal text: AAA
Contrast with black1.63:1WCAG normal text: Fail
Greyscale equivalent#2F2F2F
Inverted#E8CEA3

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#1C355Eno red cones; affects about 1% of men; ΔE 2.4 from the original
Deuteranopia#102F5Bno green cones; the most common form, about 1% of men; ΔE 1.4 from the original
Tritanopia#003B42no blue cones; rare, and affects men and women equally; ΔE 28.5 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text12.88:1WCAG large text: AAA
Contrast with black, large text1.63:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 25.8Dark slate grey · ΔE 32.7Midnight blue · ΔE 33.1Steel blue · ΔE 33.7Black · ΔE 35.9Dim grey · ΔE 37.8
Nearest named CSS colourDark slateblue (#483D8B)ΔE 25.76, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#5C4217
Analogous#17535C, #20175C
Triadic#5C1731, #315C17
Split complementary#5C2017, #535C17
Tetradic#5C1753, #5C4217, #175C20

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#6691D9
Lighter +30%#3D74CF
Lighter +20%#2B5CAE
Lighter +10%#214785
Darker −10%#0D1B33
Darker −20%#03060A
Darker −30%#000000
Darker −40%#000000
More saturated +25%#092D6A
Less saturated −25%#25354E

Channel breakdown

R23
G49
B92
Red23 (9%)
Green49 (19.2%)
Blue92 (36.1%)
Hue217.39°
Saturation (HSL)60%
Lightness22.55%
Dominant channelBlue
Hex per channelR 17 · G 31 · B 5C

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Every value on this page was computed from “17315c” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.