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Colour

#00338B

  • #00338B
  • Blue
  • Dark
  • Nearest: Midnight blue

#00338B is a blue with RGB values 0, 51, 139 and HSL 218°, 100%, 27%. It is a dark colour, so white text on it reaches 11.4:1 contrast (AAA for normal text). The nearest named colour is Midnight blue.

Colour values

#00338B#00338B
HEX#00338B
RGBrgb(0, 51, 139)
RGB (0–1)0, 0.2, 0.5451
RGB percentages0%, 20%, 54.5%
HSLhsl(218, 100%, 27.3%)
HSV / HSBhsv(218, 100%, 54.5%)
CMYK100%, 63.3%, 0%, 45.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer13,195
CSS custom property--colour: #00338B;

Brightness & contrast

Relative luminance0.04232WCAG 2.x, 0 is black and 1 is white
Perceived brightness61.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.37:1
Contrast with white11.37:1WCAG normal text: AAA
Contrast with black1.85:1WCAG normal text: Fail
Greyscale equivalent#2F2F2F
Inverted#FFCC74

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#00408Eno red cones; affects about 1% of men; ΔE 10 from the original
Deuteranopia#003489no green cones; the most common form, about 1% of men; ΔE 2.1 from the original
Tritanopia#004A5Ano blue cones; rare, and affects men and women equally; ΔE 52.7 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text11.37:1WCAG large text: AAA
Contrast with black, large text1.85:1WCAG large text: Fail

Named colours

Midnight blue · ΔE 12.5Dark slateblue · ΔE 12.7Rebecca purple · ΔE 22.2Slate blue · ΔE 25.1Royal blue · ΔE 26.8Indigo · ΔE 28.9
Nearest named CSS colourMidnight blue (#191970)ΔE 12.53, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#8B5800
Analogous#00788B, #13008B
Triadic#8B0033, #338B00
Split complementary#8B1300, #788B00
Tetradic#8B0078, #8B5800, #008B13

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#5895FF
Lighter +30%#2575FF
Lighter +20%#0058F1
Lighter +10%#0046BE
Darker −10%#002058
Darker −20%#000E25
Darker −30%#000000
Darker −40%#000000
More saturated +25%#00338B
Less saturated −25%#11387A

Channel breakdown

R0
G51
B139
Red0 (0%)
Green51 (20%)
Blue139 (54.5%)
Hue217.99°
Saturation (HSL)100%
Lightness27.25%
Dominant channelBlue
Hex per channelR 00 · G 33 · B 8B

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Every value on this page was computed from “00338b” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.