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Colour

#00388A

  • #00388A
  • Blue
  • Dark
  • Nearest: Dark slateblue

#00388A is a blue with RGB values 0, 56, 138 and HSL 216°, 100%, 27%. It is a dark colour, so white text on it reaches 10.9:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#00388A#00388A
HEX#00388A
RGBrgb(0, 56, 138)
RGB (0–1)0, 0.2196, 0.5412
RGB percentages0%, 22%, 54.1%
HSLhsl(215.7, 100%, 27.1%)
HSV / HSBhsv(215.7, 100%, 54.1%)
CMYK100%, 59.4%, 0%, 45.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer14,474
CSS custom property--colour: #00388A;

Brightness & contrast

Relative luminance0.04663WCAG 2.x, 0 is black and 1 is white
Perceived brightness63.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.87:1
Contrast with white10.87:1WCAG normal text: AAA
Contrast with black1.93:1WCAG normal text: Fail
Greyscale equivalent#323232
Inverted#FFC775

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#00438Dno red cones; affects about 1% of men; ΔE 8.3 from the original
Deuteranopia#003788no green cones; the most common form, about 1% of men; ΔE 0.7 from the original
Tritanopia#004D5Bno blue cones; rare, and affects men and women equally; ΔE 49.6 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text10.87:1WCAG large text: AAA
Contrast with black, large text1.93:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 11.6Midnight blue · ΔE 16Rebecca purple · ΔE 25Slate blue · ΔE 27.1Royal blue · ΔE 27.8Indigo · ΔE 33.2
Nearest named CSS colourDark slateblue (#483D8B)ΔE 11.59, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#8A5200
Analogous#007D8A, #0D008A
Triadic#8A0038, #388A00
Split complementary#8A0D00, #7D8A00
Tetradic#8A007D, #8A5200, #008A0D

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#579BFF
Lighter +30%#247DFF
Lighter +20%#0061F0
Lighter +10%#004DBD
Darker −10%#002357
Darker −20%#000F24
Darker −30%#000000
Darker −40%#000000
More saturated +25%#00388A
Less saturated −25%#113B79

Channel breakdown

R0
G56
B138
Red0 (0%)
Green56 (22%)
Blue138 (54.1%)
Hue215.65°
Saturation (HSL)100%
Lightness27.06%
Dominant channelBlue
Hex per channelR 00 · G 38 · B 8A

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Every value on this page was computed from “00388a” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.