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Recognised as Colour

#17356D

  • #17356D
  • Blue
  • Dark
  • Nearest: Dark slateblue

#17356D is a blue with RGB values 23, 53, 109 and HSL 219°, 65%, 26%. It is a dark colour, so white text on it reaches 11.9:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#17356D#17356D
HEX#17356D
RGBrgb(23, 53, 109)
RGB (0–1)0.0902, 0.2078, 0.4275
RGB percentages9%, 20.8%, 42.7%
HSLhsl(219.1, 65.2%, 25.9%)
HSV / HSBhsv(219.1, 78.9%, 42.7%)
CMYK78.9%, 51.4%, 0%, 57.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,521,005
CSS custom property--colour: #17356D;

Brightness & contrast

Relative luminance0.03832WCAG 2.x, 0 is black and 1 is white
Perceived brightness56.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.89:1
Contrast with white11.89:1WCAG normal text: AAA
Contrast with black1.77:1WCAG normal text: Fail
Greyscale equivalent#333333
Inverted#E8CA92

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#153B6Fno red cones; affects about 1% of men; ΔE 4.6 from the original
Deuteranopia#00336Cno green cones; the most common form, about 1% of men; ΔE 2.4 from the original
Tritanopia#00424Bno blue cones; rare, and affects men and women equally; ΔE 35.9 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text11.89:1WCAG large text: AAA
Contrast with black, large text1.77:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 18.2Midnight blue · ΔE 26.1Steel blue · ΔE 33.1Rebecca purple · ΔE 35.4Dark slate grey · ΔE 40Slate blue · ΔE 40.2
Nearest named CSS colourDark slateblue (#483D8B)ΔE 18.24, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#6D4F17
Analogous#17606D, #24176D
Triadic#6D1735, #356D17
Split complementary#6D2417, #606D17
Tetradic#6D1760, #6D4F17, #176D24

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#6F97E1
Lighter +30%#4578D8
Lighter +20%#295EC1
Lighter +10%#204997
Darker −10%#0E2143
Darker −20%#050C19
Darker −30%#000000
Darker −40%#000000
More saturated +25%#06307E
Less saturated −25%#273A5C

Channel breakdown

R23
G53
B109
Red23 (9%)
Green53 (20.8%)
Blue109 (42.7%)
Hue219.07°
Saturation (HSL)65.15%
Lightness25.88%
Dominant channelBlue
Hex per channelR 17 · G 35 · B 6D

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Every value on this page was computed from “17356d” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.