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Colour

#170D42

  • #170D42
  • Blue
  • Dark
  • Nearest: Midnight blue

#170D42 is a blue with RGB values 23, 13, 66 and HSL 251°, 67%, 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

#170D42#170D42
HEX#170D42
RGBrgb(23, 13, 66)
RGB (0–1)0.0902, 0.051, 0.2588
RGB percentages9%, 5.1%, 25.9%
HSLhsl(251.3, 67.1%, 15.5%)
HSV / HSBhsv(251.3, 80.3%, 25.9%)
CMYK65.2%, 80.3%, 0%, 74.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,510,722
CSS custom property--colour: #170D42;

Brightness & contrast

Relative luminance0.00863WCAG 2.x, 0 is black and 1 is white
Perceived brightness27.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 17.91:1
Contrast with white17.91:1WCAG normal text: AAA
Contrast with black1.17:1WCAG normal text: Fail
Greyscale equivalent#131313
Inverted#E8F2BD

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#001944no red cones; affects about 1% of men; ΔE 12 from the original
Deuteranopia#001541no green cones; the most common form, about 1% of men; ΔE 10 from the original
Tritanopia#021B26no blue cones; rare, and affects men and women equally; ΔE 34.7 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text17.91:1WCAG large text: AAA
Contrast with black, large text1.17:1WCAG large text: Fail

Named colours

Midnight blue · ΔE 21.7Dark slateblue · ΔE 25.5Rebecca purple · ΔE 35.9Indigo · ΔE 38.6Black · ΔE 39.5Navy · ΔE 41.8
Nearest named CSS colourMidnight blue (#191970)ΔE 21.73, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#38420D
Analogous#0D1E42, #310D42
Triadic#42170D, #0D4217
Split complementary#42320D, #1E420D
Tetradic#420D1E, #38420D, #0D4232

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#5E41DA
Lighter +30%#4426C2
Lighter +20%#351E97
Lighter +10%#26156D
Darker −10%#080517
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#11034C
Less saturated −25%#1D1738

Channel breakdown

R23
G13
B66
Red23 (9%)
Green13 (5.1%)
Blue66 (25.9%)
Hue251.32°
Saturation (HSL)67.09%
Lightness15.49%
Dominant channelBlue
Hex per channelR 17 · G 0D · B 42

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Every value on this page was computed from “170d42” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.