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Recognised as Colour

#172F67

  • #172F67
  • Blue
  • Dark
  • Nearest: Dark slateblue

#172F67 is a blue with RGB values 23, 47, 103 and HSL 222°, 63%, 25%. It is a dark colour, so white text on it reaches 12.8:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#172F67#172F67
HEX#172F67
RGBrgb(23, 47, 103)
RGB (0–1)0.0902, 0.1843, 0.4039
RGB percentages9%, 18.4%, 40.4%
HSLhsl(222, 63.5%, 24.7%)
HSV / HSBhsv(222, 77.7%, 40.4%)
CMYK77.7%, 54.4%, 0%, 59.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,519,463
CSS custom property--colour: #172F67;

Brightness & contrast

Relative luminance0.03194WCAG 2.x, 0 is black and 1 is white
Perceived brightness51.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 12.81:1
Contrast with white12.81:1WCAG normal text: AAA
Contrast with black1.64:1WCAG normal text: Fail
Greyscale equivalent#2E2E2E
Inverted#E8D098

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0B3669no red cones; affects about 1% of men; ΔE 6.2 from the original
Deuteranopia#002F66no green cones; the most common form, about 1% of men; ΔE 3 from the original
Tritanopia#003C46no blue cones; rare, and affects men and women equally; ΔE 35.7 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text12.81:1WCAG large text: AAA
Contrast with black, large text1.64:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 18Midnight blue · ΔE 24.2Rebecca purple · ΔE 34.6Steel blue · ΔE 35.9Slate blue · ΔE 40.5Dark slate grey · ΔE 41.5
Nearest named CSS colourDark slateblue (#483D8B)ΔE 17.98, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#674F17
Analogous#175767, #271767
Triadic#67172F, #2F6717
Split complementary#672717, #576717
Tetradic#671757, #674F17, #176727

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#6C8EDE
Lighter +30%#426ED5
Lighter +20%#2A55BA
Lighter +10%#204291
Darker −10%#0E1C3D
Darker −20%#040914
Darker −30%#000000
Darker −40%#000000
More saturated +25%#072977
Less saturated −25%#273557

Channel breakdown

R23
G47
B103
Red23 (9%)
Green47 (18.4%)
Blue103 (40.4%)
Hue222°
Saturation (HSL)63.49%
Lightness24.71%
Dominant channelBlue
Hex per channelR 17 · G 2F · B 67

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Every value on this page was computed from “172f67” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.