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Colour

#312D40

  • #312D40
  • Blue
  • Dark
  • Nearest: Dark slate grey

#312D40 is a blue with RGB values 49, 45, 64 and HSL 253°, 17%, 21%. It is a dark colour, so white text on it reaches 13.3:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#312D40#312D40
HEX#312D40
RGBrgb(49, 45, 64)
RGB (0–1)0.1922, 0.1765, 0.251
RGB percentages19.2%, 17.6%, 25.1%
HSLhsl(252.6, 17.4%, 21.4%)
HSV / HSBhsv(252.6, 29.7%, 25.1%)
CMYK23.4%, 29.7%, 0%, 74.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,222,848
CSS custom property--colour: #312D40;

Brightness & contrast

Relative luminance0.029WCAG 2.x, 0 is black and 1 is white
Perceived brightness48.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 13.29:1
Contrast with white13.29:1WCAG normal text: AAA
Contrast with black1.58:1WCAG normal text: Fail
Greyscale equivalent#2F2F2F
Inverted#CED2BF

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#293041no red cones; affects about 1% of men; ΔE 4.8 from the original
Deuteranopia#292F3Fno green cones; the most common form, about 1% of men; ΔE 4.7 from the original
Tritanopia#2E3034no blue cones; rare, and affects men and women equally; ΔE 10.7 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text13.29:1WCAG large text: AAA
Contrast with black, large text1.58:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 23Black · ΔE 23.6Dim grey · ΔE 28Slate grey · ΔE 34.4Gray · ΔE 36.4Light slate grey · ΔE 37.4
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 23.03, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#3C402D
Analogous#2D3340, #3B2D40
Triadic#40312D, #2D4031
Split complementary#403B2D, #33402D
Tetradic#402D33, #3C402D, #2D403B

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#938BAE
Lighter +30%#766D99
Lighter +20%#5F577C
Lighter +10%#48425E
Darker −10%#1A1822
Darker −20%#030304
Darker −30%#000000
Darker −40%#000000
More saturated +25%#291F4E
Less saturated −25%#373737

Channel breakdown

R49
G45
B64
Red49 (19.2%)
Green45 (17.6%)
Blue64 (25.1%)
Hue252.63°
Saturation (HSL)17.43%
Lightness21.37%
Dominant channelBlue
Hex per channelR 31 · G 2D · B 40

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Every value on this page was computed from “312d40” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.