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Colour

#31405F

  • #31405F
  • Blue
  • Dark
  • Nearest: Dark slate grey

#31405F is a blue with RGB values 49, 64, 95 and HSL 220°, 32%, 28%. It is a dark colour, so white text on it reaches 10.3:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#31405F#31405F
HEX#31405F
RGBrgb(49, 64, 95)
RGB (0–1)0.1922, 0.251, 0.3725
RGB percentages19.2%, 25.1%, 37.3%
HSLhsl(220.4, 31.9%, 28.2%)
HSV / HSBhsv(220.4, 48.4%, 37.3%)
CMYK48.4%, 32.6%, 0%, 62.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,227,743
CSS custom property--colour: #31405F;

Brightness & contrast

Relative luminance0.05146WCAG 2.x, 0 is black and 1 is white
Perceived brightness64.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.35:1
Contrast with white10.35:1WCAG normal text: AAA
Contrast with black2.03:1WCAG normal text: Fail
Greyscale equivalent#3F3F3F
Inverted#CEBFA0

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#354260no red cones; affects about 1% of men; ΔE 1.3 from the original
Deuteranopia#303E5Eno green cones; the most common form, about 1% of men; ΔE 1.2 from the original
Tritanopia#20474Bno blue cones; rare, and affects men and women equally; ΔE 20.9 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text10.35:1WCAG large text: AAA
Contrast with black, large text2.03:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 22.8Dim grey · ΔE 26.8Slate grey · ΔE 28Steel blue · ΔE 29Light slate grey · ΔE 30.7Dark slateblue · ΔE 31.7
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 22.8, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#5F5031
Analogous#31575F, #39315F
Triadic#5F3140, #405F31
Split complementary#5F3931, #575F31
Tetradic#5F3157, #5F5031, #315F39

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#94A5C8
Lighter +30%#7289B7
Lighter +20%#546DA2
Lighter +10%#425781
Darker −10%#20293D
Darker −20%#0E131C
Darker −30%#000000
Darker −40%#000000
More saturated +25%#1F3A71
Less saturated −25%#43464D

Channel breakdown

R49
G64
B95
Red49 (19.2%)
Green64 (25.1%)
Blue95 (37.3%)
Hue220.43°
Saturation (HSL)31.94%
Lightness28.24%
Dominant channelBlue
Hex per channelR 31 · G 40 · B 5F

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Every value on this page was computed from “31405f” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.