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Colour

#17103B

  • #17103B
  • Blue
  • Dark
  • Nearest: Midnight blue

#17103B is a blue with RGB values 23, 16, 59 and HSL 250°, 57%, 15%. It is a dark colour, so white text on it reaches 17.9:1 contrast (AAA for normal text). The nearest named colour is Midnight blue.

Colour values

#17103B#17103B
HEX#17103B
RGBrgb(23, 16, 59)
RGB (0–1)0.0902, 0.0627, 0.2314
RGB percentages9%, 6.3%, 23.1%
HSLhsl(249.8, 57.3%, 14.7%)
HSV / HSBhsv(249.8, 72.9%, 23.1%)
CMYK61%, 72.9%, 0%, 76.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,511,483
CSS custom property--colour: #17103B;

Brightness & contrast

Relative luminance0.00869WCAG 2.x, 0 is black and 1 is white
Perceived brightness26.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 17.89:1
Contrast with white17.89:1WCAG normal text: AAA
Contrast with black1.17:1WCAG normal text: Fail
Greyscale equivalent#151515
Inverted#E8EFC4

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#00183Cno red cones; affects about 1% of men; ΔE 10.2 from the original
Deuteranopia#00163Ano green cones; the most common form, about 1% of men; ΔE 9.5 from the original
Tritanopia#081A23no blue cones; rare, and affects men and women equally; ΔE 28.2 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text17.89:1WCAG large text: AAA
Contrast with black, large text1.17:1WCAG large text: Fail

Named colours

Midnight blue · ΔE 28.1Dark slateblue · ΔE 28.9Black · ΔE 32.9Rebecca purple · ΔE 41.1Dark slate grey · ΔE 44Indigo · ΔE 45
Nearest named CSS colourMidnight blue (#191970)ΔE 28.07, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#343B10
Analogous#101E3B, #2D103B
Triadic#3B1710, #103B17
Split complementary#3B2D10, #1E3B10
Tetradic#3B101E, #343B10, #103B2D

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#5F49CE
Lighter +30%#4631B3
Lighter +20%#36268B
Lighter +10%#271B63
Darker −10%#070513
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#110744
Less saturated −25%#1D1932

Channel breakdown

R23
G16
B59
Red23 (9%)
Green16 (6.3%)
Blue59 (23.1%)
Hue249.77°
Saturation (HSL)57.33%
Lightness14.71%
Dominant channelBlue
Hex per channelR 17 · G 10 · B 3B

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Every value on this page was computed from “17103b” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.