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Recognised as Colour

#37434F

  • #37434F
  • Blue
  • Dark
  • Nearest: Dark slate grey

#37434F is a blue with RGB values 55, 67, 79 and HSL 210°, 18%, 26%. It is a dark colour, so white text on it reaches 10.1:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#37434F#37434F
HEX#37434F
RGBrgb(55, 67, 79)
RGB (0–1)0.2157, 0.2627, 0.3098
RGB percentages21.6%, 26.3%, 31%
HSLhsl(210, 17.9%, 26.3%)
HSV / HSBhsv(210, 30.4%, 31%)
CMYK30.4%, 15.2%, 0%, 69%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,621,711
CSS custom property--colour: #37434F;

Brightness & contrast

Relative luminance0.05391WCAG 2.x, 0 is black and 1 is white
Perceived brightness65.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.1:1
Contrast with white10.1:1WCAG normal text: AAA
Contrast with black2.08:1WCAG normal text: Fail
Greyscale equivalent#414141
Inverted#C8BCB0

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#3E4350no red cones; affects about 1% of men; ΔE 2.9 from the original
Deuteranopia#3C414Fno green cones; the most common form, about 1% of men; ΔE 3.1 from the original
Tritanopia#304647no blue cones; rare, and affects men and women equally; ΔE 8.6 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text10.1:1WCAG large text: AAA
Contrast with black, large text2.08:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 11.8Dim grey · ΔE 18.9Slate grey · ΔE 25.1Gray · ΔE 27.3Light slate grey · ΔE 28.2Black · ΔE 29.2
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 11.82, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#4F4337
Analogous#374F4F, #37374F
Triadic#4F3743, #434F37
Split complementary#4F3737, #4F4F37
Tetradic#4F374F, #4F4337, #374F37

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#9AA9B8
Lighter +30%#7C90A3
Lighter +20%#61768B
Lighter +10%#4C5D6D
Darker −10%#222A31
Darker −20%#0D1013
Darker −30%#000000
Darker −40%#000000
More saturated +25%#264360
Less saturated −25%#434343

Channel breakdown

R55
G67
B79
Red55 (21.6%)
Green67 (26.3%)
Blue79 (31%)
Hue210°
Saturation (HSL)17.91%
Lightness26.27%
Dominant channelBlue
Hex per channelR 37 · G 43 · B 4F

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Every value on this page was computed from “37434f” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.