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Colour

#172B9A

  • #172B9A
  • Blue
  • Dark
  • Nearest: Midnight blue

#172B9A is a blue with RGB values 23, 43, 154 and HSL 231°, 74%, 35%. It is a dark colour, so white text on it reaches 11.4:1 contrast (AAA for normal text). The nearest named colour is Midnight blue.

Colour values

#172B9A#172B9A
HEX#172B9A
RGBrgb(23, 43, 154)
RGB (0–1)0.0902, 0.1686, 0.6039
RGB percentages9%, 16.9%, 60.4%
HSLhsl(230.8, 74%, 34.7%)
HSV / HSBhsv(230.8, 85.1%, 60.4%)
CMYK85.1%, 72.1%, 0%, 39.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,518,490
CSS custom property--colour: #172B9A;

Brightness & contrast

Relative luminance0.04243WCAG 2.x, 0 is black and 1 is white
Perceived brightness62.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.36:1
Contrast with white11.36:1WCAG normal text: AAA
Contrast with black1.85:1WCAG normal text: Fail
Greyscale equivalent#2F2F2F
Inverted#E8D465

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#00409Dno red cones; affects about 1% of men; ΔE 16.5 from the original
Deuteranopia#003498no green cones; the most common form, about 1% of men; ΔE 8.8 from the original
Tritanopia#004B5Fno blue cones; rare, and affects men and women equally; ΔE 65.5 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text11.36:1WCAG large text: AAA
Contrast with black, large text1.85:1WCAG large text: Fail

Named colours

Midnight blue · ΔE 15.5Navy · ΔE 16.7Rebecca purple · ΔE 18.4Indigo · ΔE 18.6Dark blue · ΔE 18.9Slate blue · ΔE 21.3
Nearest named CSS colourMidnight blue (#191970)ΔE 15.49, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#9A8617
Analogous#176D9A, #44179A
Triadic#9A172B, #2B9A17
Split complementary#9A4517, #6C9A17
Tetradic#9A176D, #9A8617, #179A45

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#8F9DEE
Lighter +30%#6277E8
Lighter +20%#3650E1
Lighter +10%#1E37C6
Darker −10%#101F6E
Darker −20%#0A1241
Darker −30%#030615
Darker −40%#000000
More saturated +25%#011CB0
Less saturated −25%#2D3A84

Channel breakdown

R23
G43
B154
Red23 (9%)
Green43 (16.9%)
Blue154 (60.4%)
Hue230.84°
Saturation (HSL)74.01%
Lightness34.71%
Dominant channelBlue
Hex per channelR 17 · G 2B · B 9A

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Every value on this page was computed from “172b9a” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.