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Colour

#1F3541

  • #1F3541
  • Blue
  • Dark
  • Nearest: Dark slate grey

#1F3541 is a blue with RGB values 31, 53, 65 and HSL 201°, 35%, 19%. It is a dark colour, so white text on it reaches 12.8:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#1F3541#1F3541
HEX#1F3541
RGBrgb(31, 53, 65)
RGB (0–1)0.1216, 0.2078, 0.2549
RGB percentages12.2%, 20.8%, 25.5%
HSLhsl(201.2, 35.4%, 18.8%)
HSV / HSBhsv(201.2, 52.3%, 25.5%)
CMYK52.3%, 18.5%, 0%, 74.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,045,249
CSS custom property--colour: #1F3541;

Brightness & contrast

Relative luminance0.03219WCAG 2.x, 0 is black and 1 is white
Perceived brightness49.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 12.78:1
Contrast with white12.78:1WCAG normal text: AAA
Contrast with black1.64:1WCAG normal text: Fail
Greyscale equivalent#313131
Inverted#E0CABE

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#2F3442no red cones; affects about 1% of men; ΔE 6.5 from the original
Deuteranopia#2A3141no green cones; the most common form, about 1% of men; ΔE 6.4 from the original
Tritanopia#103839no blue cones; rare, and affects men and women equally; ΔE 10.1 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text12.78:1WCAG large text: AAA
Contrast with black, large text1.64:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 14Black · ΔE 23.7Dim grey · ΔE 26.1Slate grey · ΔE 32Gray · ΔE 34.6Light slate grey · ΔE 35.1
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 14.05, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#412B1F
Analogous#1F413C, #1F2441
Triadic#411F35, #35411F
Split complementary#411F24, #413C1F
Tetradic#3C1F41, #412B1F, #24411F

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#71A1BB
Lighter +30%#5089A9
Lighter +20%#406D86
Lighter +10%#2F5164
Darker −10%#0F191E
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#13394D
Less saturated −25%#2B3135

Channel breakdown

R31
G53
B65
Red31 (12.2%)
Green53 (20.8%)
Blue65 (25.5%)
Hue201.18°
Saturation (HSL)35.42%
Lightness18.82%
Dominant channelBlue
Hex per channelR 1F · G 35 · B 41

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Every value on this page was computed from “1f3541” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.