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Recognised as Colour

#37424D

  • #37424D
  • Blue
  • Dark
  • Nearest: Dark slate grey

#37424D is a blue with RGB values 55, 66, 77 and HSL 210°, 17%, 26%. It is a dark colour, so white text on it reaches 10.2:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#37424D#37424D
HEX#37424D
RGBrgb(55, 66, 77)
RGB (0–1)0.2157, 0.2588, 0.302
RGB percentages21.6%, 25.9%, 30.2%
HSLhsl(210, 16.7%, 25.9%)
HSV / HSBhsv(210, 28.6%, 30.2%)
CMYK28.6%, 14.3%, 0%, 69.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,621,453
CSS custom property--colour: #37424D;

Brightness & contrast

Relative luminance0.05244WCAG 2.x, 0 is black and 1 is white
Perceived brightness64.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.25:1
Contrast with white10.25:1WCAG normal text: AAA
Contrast with black2.05:1WCAG normal text: Fail
Greyscale equivalent#404040
Inverted#C8BDB2

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#3E424Eno red cones; affects about 1% of men; ΔE 2.9 from the original
Deuteranopia#3B404Dno green cones; the most common form, about 1% of men; ΔE 2.8 from the original
Tritanopia#314546no blue cones; rare, and affects men and women equally; ΔE 7.8 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text10.25:1WCAG large text: AAA
Contrast with black, large text2.05:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 11.7Dim grey · ΔE 18.9Slate grey · ΔE 25.5Gray · ΔE 27.4Black · ΔE 28.6Light slate grey · ΔE 28.7
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 11.74, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#4D4237
Analogous#374D4D, #37374D
Triadic#4D3742, #424D37
Split complementary#4D3737, #4D4D37
Tetradic#4D374D, #4D4237, #374D37

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#99A8B6
Lighter +30%#7C8EA1
Lighter +20%#627588
Lighter +10%#4C5B6B
Darker −10%#22282F
Darker −20%#0C0F11
Darker −30%#000000
Darker −40%#000000
More saturated +25%#27425D
Less saturated −25%#424242

Channel breakdown

R55
G66
B77
Red55 (21.6%)
Green66 (25.9%)
Blue77 (30.2%)
Hue210°
Saturation (HSL)16.67%
Lightness25.88%
Dominant channelBlue
Hex per channelR 37 · G 42 · B 4D

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Every value on this page was computed from “37424d” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.