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Recognised as Colour

#40337E

  • #40337E
  • Blue
  • Dark
  • Nearest: Dark slateblue

#40337E is a blue with RGB values 64, 51, 126 and HSL 250°, 42%, 35%. It is a dark colour, so white text on it reaches 10.5:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#40337E#40337E
HEX#40337E
RGBrgb(64, 51, 126)
RGB (0–1)0.251, 0.2, 0.4941
RGB percentages25.1%, 20%, 49.4%
HSLhsl(250.4, 42.4%, 34.7%)
HSV / HSBhsv(250.4, 59.5%, 49.4%)
CMYK49.2%, 59.5%, 0%, 50.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,207,486
CSS custom property--colour: #40337E;

Brightness & contrast

Relative luminance0.04964WCAG 2.x, 0 is black and 1 is white
Perceived brightness67.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.54:1
Contrast with white10.54:1WCAG normal text: AAA
Contrast with black1.99:1WCAG normal text: Fail
Greyscale equivalent#3B3B3B
Inverted#BFCC81

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#004181no red cones; affects about 1% of men; ΔE 17.6 from the original
Deuteranopia#003D7Cno green cones; the most common form, about 1% of men; ΔE 17 from the original
Tritanopia#2B4453no blue cones; rare, and affects men and women equally; ΔE 42.6 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text10.54:1WCAG large text: AAA
Contrast with black, large text1.99:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 4.4Midnight blue · ΔE 14.9Rebecca purple · ΔE 18.7Slate blue · ΔE 27Indigo · ΔE 28.8Medium purple · ΔE 31.6
Nearest named CSS colourDark slateblue (#483D8B)ΔE 4.41, a close match
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#717E33
Analogous#334C7E, #65337E
Triadic#7E4033, #337E40
Split complementary#7E6533, #4C7E33
Tetradic#7E334C, #717E33, #337E65

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#ADA3DA
Lighter +30%#8C7FCB
Lighter +20%#6C5BBC
Lighter +10%#5242A2
Darker −10%#2E245A
Darker −20%#1B1635
Darker −30%#090711
Darker −40%#000000
More saturated +25%#321D94
Less saturated −25%#4E4968

Channel breakdown

R64
G51
B126
Red64 (25.1%)
Green51 (20%)
Blue126 (49.4%)
Hue250.4°
Saturation (HSL)42.37%
Lightness34.71%
Dominant channelBlue
Hex per channelR 40 · G 33 · B 7E

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Every value on this page was computed from “40337e” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.