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Recognised as Colour

#1F3A68

  • #1F3A68
  • Blue
  • Dark
  • Nearest: Dark slateblue

#1F3A68 is a blue with RGB values 31, 58, 104 and HSL 218°, 54%, 26%. It is a dark colour, so white text on it reaches 11.3:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#1F3A68#1F3A68
HEX#1F3A68
RGBrgb(31, 58, 104)
RGB (0–1)0.1216, 0.2275, 0.4078
RGB percentages12.2%, 22.7%, 40.8%
HSLhsl(217.8, 54.1%, 26.5%)
HSV / HSBhsv(217.8, 70.2%, 40.8%)
CMYK70.2%, 44.2%, 0%, 59.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,046,568
CSS custom property--colour: #1F3A68;

Brightness & contrast

Relative luminance0.04317WCAG 2.x, 0 is black and 1 is white
Perceived brightness59.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.27:1
Contrast with white11.27:1WCAG normal text: AAA
Contrast with black1.86:1WCAG normal text: Fail
Greyscale equivalent#383838
Inverted#E0C597

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#253E6Ano red cones; affects about 1% of men; ΔE 2.4 from the original
Deuteranopia#193767no green cones; the most common form, about 1% of men; ΔE 2 from the original
Tritanopia#00454Cno blue cones; rare, and affects men and women equally; ΔE 30.5 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text11.27:1WCAG large text: AAA
Contrast with black, large text1.86:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 23.8Steel blue · ΔE 29.8Dark slate grey · ΔE 32.7Midnight blue · ΔE 33.1Slate grey · ΔE 35.3Dim grey · ΔE 36.5
Nearest named CSS colourDark slateblue (#483D8B)ΔE 23.77, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#684D1F
Analogous#1F5E68, #291F68
Triadic#681F3A, #3A681F
Split complementary#68291F, #5F681F
Tetradic#681F5E, #684D1F, #1F6829

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#7B9DD8
Lighter +30%#5480CC
Lighter +20%#3666B7
Lighter +10%#2B508F
Darker −10%#132441
Darker −20%#080E19
Darker −30%#000000
Darker −40%#000000
More saturated +25%#0E3679
Less saturated −25%#303E57

Channel breakdown

R31
G58
B104
Red31 (12.2%)
Green58 (22.7%)
Blue104 (40.8%)
Hue217.81°
Saturation (HSL)54.07%
Lightness26.47%
Dominant channelBlue
Hex per channelR 1F · G 3A · B 68

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Every value on this page was computed from “1f3a68” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.