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Recognised as Colour

#1F355D

  • #1F355D
  • Blue
  • Dark
  • Nearest: Dark slateblue

#1F355D is a blue with RGB values 31, 53, 93 and HSL 219°, 50%, 24%. It is a dark colour, so white text on it reaches 12.2:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#1F355D#1F355D
HEX#1F355D
RGBrgb(31, 53, 93)
RGB (0–1)0.1216, 0.2078, 0.3647
RGB percentages12.2%, 20.8%, 36.5%
HSLhsl(218.7, 50%, 24.3%)
HSV / HSBhsv(218.7, 66.7%, 36.5%)
CMYK66.7%, 43%, 0%, 63.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,045,277
CSS custom property--colour: #1F355D;

Brightness & contrast

Relative luminance0.03628WCAG 2.x, 0 is black and 1 is white
Perceived brightness54.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 12.17:1
Contrast with white12.17:1WCAG normal text: AAA
Contrast with black1.73:1WCAG normal text: Fail
Greyscale equivalent#333333
Inverted#E0CAA2

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#23395Fno red cones; affects about 1% of men; ΔE 2.4 from the original
Deuteranopia#1B335Cno green cones; the most common form, about 1% of men; ΔE 1.2 from the original
Tritanopia#003E44no blue cones; rare, and affects men and women equally; ΔE 27.4 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text12.17:1WCAG large text: AAA
Contrast with black, large text1.73:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 27Dark slate grey · ΔE 30Steel blue · ΔE 32.1Dim grey · ΔE 34.9Black · ΔE 35.2Slate grey · ΔE 35.2
Nearest named CSS colourDark slateblue (#483D8B)ΔE 27, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#5D471F
Analogous#1F545D, #281F5D
Triadic#5D1F35, #355D1F
Split complementary#5D281F, #545D1F
Tetradic#5D1F54, #5D471F, #1F5D28

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#7697D2
Lighter +30%#507AC5
Lighter +20%#3961A9
Lighter +10%#2C4B83
Darker −10%#121F37
Darker −20%#060910
Darker −30%#000000
Darker −40%#000000
More saturated +25%#10306D
Less saturated −25%#2F394E

Channel breakdown

R31
G53
B93
Red31 (12.2%)
Green53 (20.8%)
Blue93 (36.5%)
Hue218.71°
Saturation (HSL)50%
Lightness24.31%
Dominant channelBlue
Hex per channelR 1F · G 35 · B 5D

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Every value on this page was computed from “1f355d” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.