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Colour

#1F176D

  • #1F176D
  • Blue
  • Dark
  • Nearest: Midnight blue

#1F176D is a blue with RGB values 31, 23, 109 and HSL 246°, 65%, 26%. It is a dark colour, so white text on it reaches 15:1 contrast (AAA for normal text). The nearest named colour is Midnight blue.

Colour values

#1F176D#1F176D
HEX#1F176D
RGBrgb(31, 23, 109)
RGB (0–1)0.1216, 0.0902, 0.4275
RGB percentages12.2%, 9%, 42.7%
HSLhsl(245.6, 65.2%, 25.9%)
HSV / HSBhsv(245.6, 78.9%, 42.7%)
CMYK71.6%, 78.9%, 0%, 57.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,037,613
CSS custom property--colour: #1F176D;

Brightness & contrast

Relative luminance0.02008WCAG 2.x, 0 is black and 1 is white
Perceived brightness44.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 14.98:1
Contrast with white14.98:1WCAG normal text: AAA
Contrast with black1.4:1WCAG normal text: Fail
Greyscale equivalent#1F1F1F
Inverted#E0E892

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#002A6Fno red cones; affects about 1% of men; ΔE 16.1 from the original
Deuteranopia#00236Bno green cones; the most common form, about 1% of men; ΔE 12.1 from the original
Tritanopia#003041no blue cones; rare, and affects men and women equally; ΔE 52.3 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text14.98:1WCAG large text: AAA
Contrast with black, large text1.4:1WCAG large text: Fail

Named colours

Midnight blue · ΔE 1.7Dark slateblue · ΔE 17.7Rebecca purple · ΔE 20.3Indigo · ΔE 20.5Navy · ΔE 22.5Dark blue · ΔE 27.3
Nearest named CSS colourMidnight blue (#191970)ΔE 1.66, below the just-noticeable difference
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#656D17
Analogous#173A6D, #4A176D
Triadic#6D1F17, #176D1F
Split complementary#6D4A17, #3A6D17
Tetradic#6D173A, #656D17, #176D4A

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#7A6FE1
Lighter +30%#5345D8
Lighter +20%#3729C1
Lighter +10%#2B2097
Darker −10%#130E43
Darker −20%#070519
Darker −30%#000000
Darker −40%#000000
More saturated +25%#12067E
Less saturated −25%#2C275C

Channel breakdown

R31
G23
B109
Red31 (12.2%)
Green23 (9%)
Blue109 (42.7%)
Hue245.58°
Saturation (HSL)65.15%
Lightness25.88%
Dominant channelBlue
Hex per channelR 1F · G 17 · B 6D

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Every value on this page was computed from “1f176d” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.