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Recognised as Colour

#375B71

  • #375B71
  • Blue
  • Dark
  • Nearest: Dark slate grey

#375B71 is a blue with RGB values 55, 91, 113 and HSL 203°, 35%, 33%. It is a dark colour, so white text on it reaches 7.2:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#375B71#375B71
HEX#375B71
RGBrgb(55, 91, 113)
RGB (0–1)0.2157, 0.3569, 0.4431
RGB percentages21.6%, 35.7%, 44.3%
HSLhsl(202.8, 34.5%, 32.9%)
HSV / HSBhsv(202.8, 51.3%, 44.3%)
CMYK51.3%, 19.5%, 0%, 55.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,627,889
CSS custom property--colour: #375B71;

Brightness & contrast

Relative luminance0.09487WCAG 2.x, 0 is black and 1 is white
Perceived brightness85 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.25:1
Contrast with white7.25:1WCAG normal text: AAA
Contrast with black2.9:1WCAG normal text: Fail
Greyscale equivalent#555555
Inverted#C8A48E

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#515A72no red cones; affects about 1% of men; ΔE 9 from the original
Deuteranopia#495471no green cones; the most common form, about 1% of men; ΔE 9.8 from the original
Tritanopia#1A6162no blue cones; rare, and affects men and women equally; ΔE 17.4 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text7.25:1WCAG large text: AAA
Contrast with black, large text2.9:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 15Slate grey · ΔE 17.5Dim grey · ΔE 19.2Light slate grey · ΔE 20.2Steel blue · ΔE 22.2Gray · ΔE 24.3
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 15.01, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#714D37
Analogous#37716A, #373E71
Triadic#71375B, #5B7137
Split complementary#71373E, #716A37
Tetradic#6A3771, #714D37, #3E7137

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#A2C0D2
Lighter +30%#80A8C1
Lighter +20%#5E91B0
Lighter +10%#487793
Darker −10%#263F4F
Darker −20%#16242C
Darker −30%#05080A
Darker −40%#000000
More saturated +25%#226086
Less saturated −25%#4C565C

Channel breakdown

R55
G91
B113
Red55 (21.6%)
Green91 (35.7%)
Blue113 (44.3%)
Hue202.76°
Saturation (HSL)34.52%
Lightness32.94%
Dominant channelBlue
Hex per channelR 37 · G 5B · B 71

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Every value on this page was computed from “375b71” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.