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Colour

#373A7D

  • #373A7D
  • Blue
  • Dark
  • Nearest: Dark slateblue

#373A7D is a blue with RGB values 55, 58, 125 and HSL 237°, 39%, 35%. 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 slateblue.

Colour values

#373A7D#373A7D
HEX#373A7D
RGBrgb(55, 58, 125)
RGB (0–1)0.2157, 0.2275, 0.4902
RGB percentages21.6%, 22.7%, 49%
HSLhsl(237.4, 38.9%, 35.3%)
HSV / HSBhsv(237.4, 56%, 49%)
CMYK56%, 53.6%, 0%, 51%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,619,453
CSS custom property--colour: #373A7D;

Brightness & contrast

Relative luminance0.05319WCAG 2.x, 0 is black and 1 is white
Perceived brightness68.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.18:1
Contrast with white10.18:1WCAG normal text: AAA
Contrast with black2.06:1WCAG normal text: Fail
Greyscale equivalent#3E3E3E
Inverted#C8C582

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#17447Fno red cones; affects about 1% of men; ΔE 11.8 from the original
Deuteranopia#0C3E7Cno green cones; the most common form, about 1% of men; ΔE 9.9 from the original
Tritanopia#164955no blue cones; rare, and affects men and women equally; ΔE 41.4 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text10.18:1WCAG large text: AAA
Contrast with black, large text2.06:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 8.1Midnight blue · ΔE 20.2Rebecca purple · ΔE 25.5Slate blue · ΔE 30.9Royal blue · ΔE 34.1Medium purple · ΔE 34.4
Nearest named CSS colourDark slateblue (#483D8B)ΔE 8.14, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#7D7A37
Analogous#375D7D, #57377D
Triadic#7D373A, #3A7D37
Split complementary#7D5737, #5D7D37
Tetradic#7D375D, #7D7A37, #377D57

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#A7AAD8
Lighter +30%#8487C9
Lighter +20%#6164B9
Lighter +10%#474AA0
Darker −10%#272A5A
Darker −20%#181936
Darker −30%#080913
Darker −40%#000000
More saturated +25%#202593
Less saturated −25%#4E4F67

Channel breakdown

R55
G58
B125
Red55 (21.6%)
Green58 (22.7%)
Blue125 (49%)
Hue237.43°
Saturation (HSL)38.89%
Lightness35.29%
Dominant channelBlue
Hex per channelR 37 · G 3A · B 7D

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Every value on this page was computed from “373a7d” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.