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Colour

#00399F

  • #00399F
  • Blue
  • Dark
  • Nearest: Midnight blue

#00399F is a blue with RGB values 0, 57, 159 and HSL 218°, 100%, 31%. It is a dark colour, so white text on it reaches 10.1:1 contrast (AAA for normal text). The nearest named colour is Midnight blue.

Colour values

#00399F#00399F
HEX#00399F
RGBrgb(0, 57, 159)
RGB (0–1)0, 0.2235, 0.6235
RGB percentages0%, 22.4%, 62.4%
HSLhsl(218.5, 100%, 31.2%)
HSV / HSBhsv(218.5, 100%, 62.4%)
CMYK100%, 64.2%, 0%, 37.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer14,751
CSS custom property--colour: #00399F;

Brightness & contrast

Relative luminance0.05429WCAG 2.x, 0 is black and 1 is white
Perceived brightness69.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.07:1
Contrast with white10.07:1WCAG normal text: AAA
Contrast with black2.09:1WCAG normal text: Fail
Greyscale equivalent#343434
Inverted#FFC660

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0049A2no red cones; affects about 1% of men; ΔE 12.4 from the original
Deuteranopia#003B9Dno green cones; the most common form, about 1% of men; ΔE 2.9 from the original
Tritanopia#005466no blue cones; rare, and affects men and women equally; ΔE 60 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text10.07:1WCAG large text: AAA
Contrast with black, large text2.09:1WCAG large text: Fail

Named colours

Midnight blue · ΔE 16.1Dark slateblue · ΔE 17.4Slate blue · ΔE 19.6Rebecca purple · ΔE 20.4Royal blue · ΔE 20.8Navy · ΔE 25.8
Nearest named CSS colourMidnight blue (#191970)ΔE 16.08, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#9F6600
Analogous#00899F, #16009F
Triadic#9F0039, #399F00
Split complementary#9F1600, #899F00
Tetradic#9F0089, #9F6600, #009F16

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#6CA1FF
Lighter +30%#3980FF
Lighter +20%#065FFF
Lighter +10%#004BD2
Darker −10%#00276C
Darker −20%#001439
Darker −30%#000206
Darker −40%#000000
More saturated +25%#00399F
Less saturated −25%#143F8B

Channel breakdown

R0
G57
B159
Red0 (0%)
Green57 (22.4%)
Blue159 (62.4%)
Hue218.49°
Saturation (HSL)100%
Lightness31.18%
Dominant channelBlue
Hex per channelR 00 · G 39 · B 9F

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Every value on this page was computed from “00399f” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.