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Colour

#003391

  • #003391
  • Blue
  • Dark
  • Nearest: Midnight blue

#003391 is a blue with RGB values 0, 51, 145 and HSL 219°, 100%, 28%. It is a dark colour, so white text on it reaches 11.2:1 contrast (AAA for normal text). The nearest named colour is Midnight blue.

Colour values

#003391#003391
HEX#003391
RGBrgb(0, 51, 145)
RGB (0–1)0, 0.2, 0.5686
RGB percentages0%, 20%, 56.9%
HSLhsl(218.9, 100%, 28.4%)
HSV / HSBhsv(218.9, 100%, 56.9%)
CMYK100%, 64.8%, 0%, 43.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer13,201
CSS custom property--colour: #003391;

Brightness & contrast

Relative luminance0.04412WCAG 2.x, 0 is black and 1 is white
Perceived brightness62.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.16:1
Contrast with white11.16:1WCAG normal text: AAA
Contrast with black1.88:1WCAG normal text: Fail
Greyscale equivalent#2F2F2F
Inverted#FFCC6E

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#004294no red cones; affects about 1% of men; ΔE 11.7 from the original
Deuteranopia#00358Fno green cones; the most common form, about 1% of men; ΔE 2.9 from the original
Tritanopia#004C5Dno blue cones; rare, and affects men and women equally; ΔE 56 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text11.16:1WCAG large text: AAA
Contrast with black, large text1.88:1WCAG large text: Fail

Named colours

Midnight blue · ΔE 12.5Dark slateblue · ΔE 14.6Rebecca purple · ΔE 20.7Slate blue · ΔE 23Royal blue · ΔE 24.9Indigo · ΔE 26.6
Nearest named CSS colourMidnight blue (#191970)ΔE 12.46, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#915E00
Analogous#007C91, #150091
Triadic#910033, #339100
Split complementary#911500, #7C9100
Tetradic#91007C, #915E00, #009115

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#5E97FF
Lighter +30%#2B76FF
Lighter +20%#0057F7
Lighter +10%#0045C4
Darker −10%#00215E
Darker −20%#000F2B
Darker −30%#000000
Darker −40%#000000
More saturated +25%#003391
Less saturated −25%#12387F

Channel breakdown

R0
G51
B145
Red0 (0%)
Green51 (20%)
Blue145 (56.9%)
Hue218.9°
Saturation (HSL)100%
Lightness28.43%
Dominant channelBlue
Hex per channelR 00 · G 33 · B 91

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Every value on this page was computed from “hex 003391” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.