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Recognised as Colour

#374AA3

  • #374AA3
  • Blue
  • Dark
  • Nearest: Dark slateblue

#374AA3 is a blue with RGB values 55, 74, 163 and HSL 229°, 50%, 43%. It is a dark colour, so white text on it reaches 7.9:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#374AA3#374AA3
HEX#374AA3
RGBrgb(55, 74, 163)
RGB (0–1)0.2157, 0.2902, 0.6392
RGB percentages21.6%, 29%, 63.9%
HSLhsl(229.4, 49.5%, 42.7%)
HSV / HSBhsv(229.4, 66.3%, 63.9%)
CMYK66.3%, 54.6%, 0%, 36.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,623,587
CSS custom property--colour: #374AA3;

Brightness & contrast

Relative luminance0.08354WCAG 2.x, 0 is black and 1 is white
Perceived brightness84.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.86:1
Contrast with white7.86:1WCAG normal text: AAA
Contrast with black2.67:1WCAG normal text: Fail
Greyscale equivalent#4C4C4C
Inverted#C8B55C

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0957A6no red cones; affects about 1% of men; ΔE 12.8 from the original
Deuteranopia#004DA1no green cones; the most common form, about 1% of men; ΔE 8.2 from the original
Tritanopia#005F6Fno blue cones; rare, and affects men and women equally; ΔE 52.9 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text7.86:1WCAG large text: AAA
Contrast with black, large text2.67:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 10Slate blue · ΔE 18.8Royal blue · ΔE 20.2Rebecca purple · ΔE 20.9Midnight blue · ΔE 21.1Medium purple · ΔE 24.9
Nearest named CSS colourDark slateblue (#483D8B)ΔE 9.96, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#A39037
Analogous#3780A3, #5A37A3
Triadic#A3374A, #4AA337
Split complementary#A35A37, #80A337
Tetradic#A33780, #A39037, #37A35A

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#BDC5E9
Lighter +30%#97A3DC
Lighter +20%#7181CF
Lighter +10%#4B60C2
Darker −10%#2A397D
Darker −20%#1D2757
Darker −30%#101631
Darker −40%#04050A
More saturated +25%#1C38BE
Less saturated −25%#525C88

Channel breakdown

R55
G74
B163
Red55 (21.6%)
Green74 (29%)
Blue163 (63.9%)
Hue229.44°
Saturation (HSL)49.54%
Lightness42.75%
Dominant channelBlue
Hex per channelR 37 · G 4A · B A3

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Every value on this page was computed from “374aa3” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.