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Recognised as Colour

#172B82

  • #172B82
  • Blue
  • Dark
  • Nearest: Midnight blue

#172B82 is a blue with RGB values 23, 43, 130 and HSL 229°, 70%, 30%. It is a dark colour, so white text on it reaches 12.3:1 contrast (AAA for normal text). The nearest named colour is Midnight blue.

Colour values

#172B82#172B82
HEX#172B82
RGBrgb(23, 43, 130)
RGB (0–1)0.0902, 0.1686, 0.5098
RGB percentages9%, 16.9%, 51%
HSLhsl(228.8, 69.9%, 30%)
HSV / HSBhsv(228.8, 82.3%, 51%)
CMYK82.3%, 66.9%, 0%, 49%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,518,466
CSS custom property--colour: #172B82;

Brightness & contrast

Relative luminance0.03522WCAG 2.x, 0 is black and 1 is white
Perceived brightness56.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 12.32:1
Contrast with white12.32:1WCAG normal text: AAA
Contrast with black1.7:1WCAG normal text: Fail
Greyscale equivalent#2D2D2D
Inverted#E8D47D

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#003A85no red cones; affects about 1% of men; ΔE 12.4 from the original
Deuteranopia#003080no green cones; the most common form, about 1% of men; ΔE 6.3 from the original
Tritanopia#004252no blue cones; rare, and affects men and women equally; ΔE 52.9 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text12.32:1WCAG large text: AAA
Contrast with black, large text1.7:1WCAG large text: Fail

Named colours

Midnight blue · ΔE 8.2Dark slateblue · ΔE 12.5Rebecca purple · ΔE 20Indigo · ΔE 25.4Slate blue · ΔE 26.1Navy · ΔE 26.7
Nearest named CSS colourMidnight blue (#191970)ΔE 8.2, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#826E17
Analogous#176082, #391782
Triadic#82172B, #2B8217
Split complementary#823917, #618217
Tetradic#821760, #826E17, #178239

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#7D91E8
Lighter +30%#526CE0
Lighter +20%#2648D9
Lighter +10%#1F39AD
Darker −10%#0F1D57
Darker −20%#080E2B
Darker −30%#000000
Darker −40%#000000
More saturated +25%#041F95
Less saturated −25%#2A376F

Channel breakdown

R23
G43
B130
Red23 (9%)
Green43 (16.9%)
Blue130 (51%)
Hue228.79°
Saturation (HSL)69.93%
Lightness30%
Dominant channelBlue
Hex per channelR 17 · G 2B · B 82

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Every value on this page was computed from “172b82” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.