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Recognised as Colour

#040057

  • #040057
  • Blue
  • Dark
  • Nearest: Midnight blue

#040057 is a blue with RGB values 4, 0, 87 and HSL 243°, 100%, 17%. It is a dark colour, so white text on it reaches 18.4:1 contrast (AAA for normal text). The nearest named colour is Midnight blue.

Colour values

#040057#040057
HEX#040057
RGBrgb(4, 0, 87)
RGB (0–1)0.0157, 0, 0.3412
RGB percentages1.6%, 0%, 34.1%
HSLhsl(242.8, 100%, 17.1%)
HSV / HSBhsv(242.8, 100%, 34.1%)
CMYK95.4%, 100%, 0%, 65.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer262,231
CSS custom property--colour: #040057;

Brightness & contrast

Relative luminance0.00714WCAG 2.x, 0 is black and 1 is white
Perceived brightness29.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 18.38:1
Contrast with white18.38:1WCAG normal text: AAA
Contrast with black1.14:1WCAG normal text: Fail
Greyscale equivalent#070707
Inverted#FBFFA8

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#001959no red cones; affects about 1% of men; ΔE 18.2 from the original
Deuteranopia#000F56no green cones; the most common form, about 1% of men; ΔE 11.1 from the original
Tritanopia#001F2Fno blue cones; rare, and affects men and women equally; ΔE 53.2 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text18.38:1WCAG large text: AAA
Contrast with black, large text1.14:1WCAG large text: Fail

Named colours

Midnight blue · ΔE 10.3Navy · ΔE 21Indigo · ΔE 21.7Dark blue · ΔE 26.2Dark slateblue · ΔE 27Rebecca purple · ΔE 27.4
Nearest named CSS colourMidnight blue (#191970)ΔE 10.29, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#535700
Analogous#002757, #300057
Triadic#570400, #005704
Split complementary#573000, #275700
Tetradic#570027, #535700, #005730

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#2E24FF
Lighter +30%#0B00F0
Lighter +20%#0900BD
Lighter +10%#06008A
Darker −10%#020024
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#040057
Less saturated −25%#0E0B4C

Channel breakdown

R4
G0
B87
Red4 (1.6%)
Green0 (0%)
Blue87 (34.1%)
Hue242.76°
Saturation (HSL)100%
Lightness17.06%
Dominant channelBlue
Hex per channelR 04 · G 00 · B 57

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Every value on this page was computed from “hex 040057” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.