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Recognised as Colour

#1F243A

  • #1F243A
  • Blue
  • Dark
  • Nearest: Black

#1F243A is a blue with RGB values 31, 36, 58 and HSL 229°, 30%, 17%. It is a dark colour, so white text on it reaches 15.3:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#1F243A#1F243A
HEX#1F243A
RGBrgb(31, 36, 58)
RGB (0–1)0.1216, 0.1412, 0.2275
RGB percentages12.2%, 14.1%, 22.7%
HSLhsl(228.9, 30.3%, 17.5%)
HSV / HSBhsv(228.9, 46.6%, 22.7%)
CMYK46.6%, 37.9%, 0%, 77.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,040,890
CSS custom property--colour: #1F243A;

Brightness & contrast

Relative luminance0.01859WCAG 2.x, 0 is black and 1 is white
Perceived brightness37.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 15.31:1
Contrast with white15.31:1WCAG normal text: AAA
Contrast with black1.37:1WCAG normal text: Fail
Greyscale equivalent#252525
Inverted#E0DBC5

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#1D263Bno red cones; affects about 1% of men; ΔE 1.9 from the original
Deuteranopia#1A2439no green cones; the most common form, about 1% of men; ΔE 2 from the original
Tritanopia#16282Cno blue cones; rare, and affects men and women equally; ΔE 14.6 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text15.31:1WCAG large text: AAA
Contrast with black, large text1.37:1WCAG large text: Fail

Named colours

Black · ΔE 21.5Dark slate grey · ΔE 25.8Dim grey · ΔE 33.5Dark slateblue · ΔE 38.1Slate grey · ΔE 39Gray · ΔE 41.9
Nearest named CSS colourBlack (#000000)ΔE 21.47, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#3A351F
Analogous#1F313A, #281F3A
Triadic#3A1F24, #243A1F
Split complementary#3A281F, #313A1F
Tetradic#3A1F31, #3A351F, #1F3A28

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#727EB3
Lighter +30%#54629E
Lighter +20%#434D7C
Lighter +10%#31395B
Darker −10%#0D0F19
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#141D45
Less saturated −25%#2A2B2F

Channel breakdown

R31
G36
B58
Red31 (12.2%)
Green36 (14.1%)
Blue58 (22.7%)
Hue228.89°
Saturation (HSL)30.34%
Lightness17.45%
Dominant channelBlue
Hex per channelR 1F · G 24 · B 3A

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Every value on this page was computed from “1f243a” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.