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Recognised as Colour

#404EA3

  • #404EA3
  • Blue
  • Dark
  • Nearest: Dark slateblue

#404EA3 is a blue with RGB values 64, 78, 163 and HSL 232°, 44%, 45%. It is a dark colour, so white text on it reaches 7.4:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#404EA3#404EA3
HEX#404EA3
RGBrgb(64, 78, 163)
RGB (0–1)0.251, 0.3059, 0.6392
RGB percentages25.1%, 30.6%, 63.9%
HSLhsl(231.5, 43.6%, 44.5%)
HSV / HSBhsv(231.5, 60.7%, 63.9%)
CMYK60.7%, 52.1%, 0%, 36.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,214,435
CSS custom property--colour: #404EA3;

Brightness & contrast

Relative luminance0.09183WCAG 2.x, 0 is black and 1 is white
Perceived brightness88.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.4:1
Contrast with white7.4:1WCAG normal text: AAA
Contrast with black2.84:1WCAG normal text: Fail
Greyscale equivalent#515151
Inverted#BFB15C

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#1E5AA6no red cones; affects about 1% of men; ΔE 12.1 from the original
Deuteranopia#0351A1no green cones; the most common form, about 1% of men; ΔE 9.8 from the original
Tritanopia#006271no blue cones; rare, and affects men and women equally; ΔE 51.4 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text7.4:1WCAG large text: AAA
Contrast with black, large text2.84:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 9.2Slate blue · ΔE 19.9Royal blue · ΔE 21.5Rebecca purple · ΔE 21.8Midnight blue · ΔE 23Medium purple · ΔE 24.3
Nearest named CSS colourDark slateblue (#483D8B)ΔE 9.24, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#A39540
Analogous#4080A3, #6340A3
Triadic#A3404E, #4EA340
Split complementary#A36340, #80A340
Tetradic#A34080, #A39540, #40A363

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#C6CBE9
Lighter +30%#A2AADA
Lighter +20%#7D88CC
Lighter +10%#5867BE
Darker −10%#323C7E
Darker −20%#232B5A
Darker −30%#151935
Darker −40%#060811
More saturated +25%#243ABF
Less saturated −25%#5C6287

Channel breakdown

R64
G78
B163
Red64 (25.1%)
Green78 (30.6%)
Blue163 (63.9%)
Hue231.52°
Saturation (HSL)43.61%
Lightness44.51%
Dominant channelBlue
Hex per channelR 40 · G 4E · B A3

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Every value on this page was computed from “404ea3” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.