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Recognised as Colour

#2D3748

  • #2D3748
  • Blue
  • Dark
  • Nearest: Dark slate grey

#2D3748 is a blue with RGB values 45, 55, 72 and HSL 218°, 23%, 23%. It is a dark colour, so white text on it reaches 12:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#2D3748#2D3748
HEX#2D3748
RGBrgb(45, 55, 72)
RGB (0–1)0.1765, 0.2157, 0.2824
RGB percentages17.6%, 21.6%, 28.2%
HSLhsl(217.8, 23.1%, 22.9%)
HSV / HSBhsv(217.8, 37.5%, 28.2%)
CMYK37.5%, 23.6%, 0%, 71.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,963,272
CSS custom property--colour: #2D3748;

Brightness & contrast

Relative luminance0.03758WCAG 2.x, 0 is black and 1 is white
Perceived brightness54.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.99:1
Contrast with white11.99:1WCAG normal text: AAA
Contrast with black1.75:1WCAG normal text: Fail
Greyscale equivalent#363636
Inverted#D2C8B7

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#313849no red cones; affects about 1% of men; ΔE 1.3 from the original
Deuteranopia#2E3548no green cones; the most common form, about 1% of men; ΔE 2 from the original
Tritanopia#253B3Dno blue cones; rare, and affects men and women equally; ΔE 11.7 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text11.99:1WCAG large text: AAA
Contrast with black, large text1.75:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 17.1Dim grey · ΔE 24.6Black · ΔE 25.7Slate grey · ΔE 30.1Gray · ΔE 32.9Light slate grey · ΔE 33.2
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 17.05, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#483E2D
Analogous#2D4448, #312D48
Triadic#482D37, #37482D
Split complementary#48312D, #45482D
Tetradic#482D44, #483E2D, #2D4830

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#8B9BB6
Lighter +30%#6B80A3
Lighter +20%#546787
Lighter +10%#414F67
Darker −10%#191F29
Darker −20%#060709
Darker −30%#000000
Darker −40%#000000
More saturated +25%#1E3357
Less saturated −25%#3B3B3B

Channel breakdown

R45
G55
B72
Red45 (17.6%)
Green55 (21.6%)
Blue72 (28.2%)
Hue217.78°
Saturation (HSL)23.08%
Lightness22.94%
Dominant channelBlue
Hex per channelR 2D · G 37 · B 48

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Every value on this page was computed from “2d3748” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.