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Recognised as Colour

#1F3660

  • #1F3660
  • Blue
  • Dark
  • Nearest: Dark slateblue

#1F3660 is a blue with RGB values 31, 54, 96 and HSL 219°, 51%, 25%. It is a dark colour, so white text on it reaches 12:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#1F3660#1F3660
HEX#1F3660
RGBrgb(31, 54, 96)
RGB (0–1)0.1216, 0.2118, 0.3765
RGB percentages12.2%, 21.2%, 37.6%
HSLhsl(218.8, 51.2%, 24.9%)
HSV / HSBhsv(218.8, 67.7%, 37.6%)
CMYK67.7%, 43.7%, 0%, 62.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,045,536
CSS custom property--colour: #1F3660;

Brightness & contrast

Relative luminance0.03774WCAG 2.x, 0 is black and 1 is white
Perceived brightness55.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.97:1
Contrast with white11.97:1WCAG normal text: AAA
Contrast with black1.75:1WCAG normal text: Fail
Greyscale equivalent#343434
Inverted#E0C99F

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#233A62no red cones; affects about 1% of men; ΔE 2.4 from the original
Deuteranopia#1A345Fno green cones; the most common form, about 1% of men; ΔE 1.3 from the original
Tritanopia#004046no blue cones; rare, and affects men and women equally; ΔE 28.8 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text11.97:1WCAG large text: AAA
Contrast with black, large text1.75:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 25.8Dark slate grey · ΔE 31Steel blue · ΔE 31.6Midnight blue · ΔE 34.4Slate grey · ΔE 35.5Dim grey · ΔE 35.6
Nearest named CSS colourDark slateblue (#483D8B)ΔE 25.83, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#60491F
Analogous#1F5760, #281F60
Triadic#601F36, #36601F
Split complementary#60291F, #56601F
Tetradic#601F57, #60491F, #1F6029

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#7898D3
Lighter +30%#517BC7
Lighter +20%#3861AD
Lighter +10%#2B4C87
Darker −10%#132039
Darker −20%#060B13
Darker −30%#000000
Darker −40%#000000
More saturated +25%#0F3170
Less saturated −25%#2F3B50

Channel breakdown

R31
G54
B96
Red31 (12.2%)
Green54 (21.2%)
Blue96 (37.6%)
Hue218.77°
Saturation (HSL)51.18%
Lightness24.9%
Dominant channelBlue
Hex per channelR 1F · G 36 · B 60

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Every value on this page was computed from “1f3660” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.