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Recognised as Colour

#37374D

  • #37374D
  • Blue
  • Dark
  • Nearest: Dark slate grey

#37374D is a blue with RGB values 55, 55, 77 and HSL 240°, 17%, 26%. It is a dark colour, so white text on it reaches 11.6:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#37374D#37374D
HEX#37374D
RGBrgb(55, 55, 77)
RGB (0–1)0.2157, 0.2157, 0.302
RGB percentages21.6%, 21.6%, 30.2%
HSLhsl(240, 16.7%, 25.9%)
HSV / HSBhsv(240, 28.6%, 30.2%)
CMYK28.6%, 28.6%, 0%, 69.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,618,637
CSS custom property--colour: #37374D;

Brightness & contrast

Relative luminance0.0408WCAG 2.x, 0 is black and 1 is white
Perceived brightness57.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.56:1
Contrast with white11.56:1WCAG normal text: AAA
Contrast with black1.82:1WCAG normal text: Fail
Greyscale equivalent#393939
Inverted#C8C8B2

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#313A4Eno red cones; affects about 1% of men; ΔE 3.9 from the original
Deuteranopia#30384Cno green cones; the most common form, about 1% of men; ΔE 3.5 from the original
Tritanopia#323B3Fno blue cones; rare, and affects men and women equally; ΔE 12.9 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text11.56:1WCAG large text: AAA
Contrast with black, large text1.82:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 21.3Dim grey · ΔE 25.2Black · ΔE 28Slate grey · ΔE 30.1Light slate grey · ΔE 33.1Gray · ΔE 33.1
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 21.29, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#4D4D37
Analogous#37424D, #42374D
Triadic#4D3737, #374D37
Split complementary#4D4237, #424D37
Tetradic#4D3742, #4D4D37, #374D42

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#9999B6
Lighter +30%#7C7CA1
Lighter +20%#626288
Lighter +10%#4C4C6B
Darker −10%#22222F
Darker −20%#0C0C11
Darker −30%#000000
Darker −40%#000000
More saturated +25%#27275D
Less saturated −25%#424242

Channel breakdown

R55
G55
B77
Red55 (21.6%)
Green55 (21.6%)
Blue77 (30.2%)
Hue240°
Saturation (HSL)16.67%
Lightness25.88%
Dominant channelBlue
Hex per channelR 37 · G 37 · B 4D

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Every value on this page was computed from “37374d” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.