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Recognised as Colour

#372DA3

  • #372DA3
  • Blue
  • Dark
  • Nearest: Indigo

#372DA3 is a blue with RGB values 55, 45, 163 and HSL 245°, 57%, 41%. It is a dark colour, so white text on it reaches 10.2:1 contrast (AAA for normal text). The nearest named colour is Indigo.

Colour values

#372DA3#372DA3
HEX#372DA3
RGBrgb(55, 45, 163)
RGB (0–1)0.2157, 0.1765, 0.6392
RGB percentages21.6%, 17.6%, 63.9%
HSLhsl(245.1, 56.7%, 40.8%)
HSV / HSBhsv(245.1, 72.4%, 63.9%)
CMYK66.3%, 72.4%, 0%, 36.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,616,163
CSS custom property--colour: #372DA3;

Brightness & contrast

Relative luminance0.05333WCAG 2.x, 0 is black and 1 is white
Perceived brightness71.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.16:1
Contrast with white10.16:1WCAG normal text: AAA
Contrast with black2.07:1WCAG normal text: Fail
Greyscale equivalent#383838
Inverted#C8D25C

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0046A7no red cones; affects about 1% of men; ΔE 20.3 from the original
Deuteranopia#003CA1no green cones; the most common form, about 1% of men; ΔE 15.2 from the original
Tritanopia#004E65no blue cones; rare, and affects men and women equally; ΔE 67.6 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text10.16:1WCAG large text: AAA
Contrast with black, large text2.07:1WCAG large text: Fail

Named colours

Indigo · ΔE 15.7Rebecca purple · ΔE 15.9Navy · ΔE 16.4Dark blue · ΔE 17.5Slate blue · ΔE 18.8Midnight blue · ΔE 19.3
Nearest named CSS colourIndigo (#4B0082)ΔE 15.71, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#99A32D
Analogous#2D5EA3, #722DA3
Triadic#A3372D, #2DA337
Split complementary#A3722D, #5EA32D
Tetradic#A32D5E, #99A32D, #2DA372

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#B7B2EA
Lighter +30%#918ADF
Lighter +20%#6C62D4
Lighter +10%#463AC9
Darker −10%#2A227B
Darker −20%#1C1753
Darker −30%#0F0C2B
Darker −40%#010103
More saturated +25%#2113BD
Less saturated −25%#4D4789

Channel breakdown

R55
G45
B163
Red55 (21.6%)
Green45 (17.6%)
Blue163 (63.9%)
Hue245.08°
Saturation (HSL)56.73%
Lightness40.78%
Dominant channelBlue
Hex per channelR 37 · G 2D · B A3

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Every value on this page was computed from “372da3” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.