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Colour

#31353F

  • #31353F
  • Blue
  • Dark
  • Nearest: Dark slate grey

#31353F is a blue with RGB values 49, 53, 63 and HSL 223°, 13%, 22%. It is a dark colour, so white text on it reaches 12.3:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#31353F#31353F
HEX#31353F
RGBrgb(49, 53, 63)
RGB (0–1)0.1922, 0.2078, 0.2471
RGB percentages19.2%, 20.8%, 24.7%
HSLhsl(222.9, 12.5%, 22%)
HSV / HSBhsv(222.9, 22.2%, 24.7%)
CMYK22.2%, 15.9%, 0%, 75.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,224,895
CSS custom property--colour: #31353F;

Brightness & contrast

Relative luminance0.03558WCAG 2.x, 0 is black and 1 is white
Perceived brightness53.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 12.27:1
Contrast with white12.27:1WCAG normal text: AAA
Contrast with black1.71:1WCAG normal text: Fail
Greyscale equivalent#353535
Inverted#CECAC0

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#32363Fno red cones; affects about 1% of men; ΔE 0.8 from the original
Deuteranopia#31343Fno green cones; the most common form, about 1% of men; ΔE 0.9 from the original
Tritanopia#2E3738no blue cones; rare, and affects men and women equally; ΔE 6.6 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text12.27:1WCAG large text: AAA
Contrast with black, large text1.71:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 15.9Black · ΔE 23.2Dim grey · ΔE 23.3Slate grey · ΔE 31.1Gray · ΔE 32.2Light slate grey · ΔE 34.2
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 15.85, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#3F3B31
Analogous#313C3F, #34313F
Triadic#3F3135, #353F31
Split complementary#3F3431, #3C3F31
Tetradic#3F313C, #3F3B31, #313F34

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#9299AA
Lighter +30%#757E94
Lighter +20%#5E6578
Lighter +10%#474D5C
Darker −10%#1B1D22
Darker −20%#040506
Darker −30%#000000
Darker −40%#000000
More saturated +25%#232F4D
Less saturated −25%#383838

Channel breakdown

R49
G53
B63
Red49 (19.2%)
Green53 (20.8%)
Blue63 (24.7%)
Hue222.86°
Saturation (HSL)12.5%
Lightness21.96%
Dominant channelBlue
Hex per channelR 31 · G 35 · B 3F

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Every value on this page was computed from “31353f” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.