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Recognised as Colour

#003380

  • #003380
  • Blue
  • Dark
  • Nearest: Dark slateblue

#003380 is a blue with RGB values 0, 51, 128 and HSL 216°, 100%, 25%. It is a dark colour, so white text on it reaches 11.8:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#003380#003380
HEX#003380
RGBrgb(0, 51, 128)
RGB (0–1)0, 0.2, 0.502
RGB percentages0%, 20%, 50.2%
HSLhsl(216.1, 100%, 25.1%)
HSV / HSBhsv(216.1, 100%, 50.2%)
CMYK100%, 60.2%, 0%, 49.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer13,184
CSS custom property--colour: #003380;

Brightness & contrast

Relative luminance0.03926WCAG 2.x, 0 is black and 1 is white
Perceived brightness58.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.76:1
Contrast with white11.76:1WCAG normal text: AAA
Contrast with black1.79:1WCAG normal text: Fail
Greyscale equivalent#2E2E2E
Inverted#FFCC7F

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#003E83no red cones; affects about 1% of men; ΔE 8.4 from the original
Deuteranopia#00337Fno green cones; the most common form, about 1% of men; ΔE 0.7 from the original
Tritanopia#004754no blue cones; rare, and affects men and women equally; ΔE 47.3 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text11.76:1WCAG large text: AAA
Contrast with black, large text1.79:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 11.9Midnight blue · ΔE 15.5Rebecca purple · ΔE 26.3Slate blue · ΔE 30Royal blue · ΔE 31.2Indigo · ΔE 33.9
Nearest named CSS colourDark slateblue (#483D8B)ΔE 11.91, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#804D00
Analogous#007380, #0D0080
Triadic#800033, #338000
Split complementary#800D00, #738000
Tetradic#800073, #804D00, #00800D

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#4D94FF
Lighter +30%#1A75FF
Lighter +20%#005CE6
Lighter +10%#0047B3
Darker −10%#001F4D
Darker −20%#000A1A
Darker −30%#000000
Darker −40%#000000
More saturated +25%#003380
Less saturated −25%#103670

Channel breakdown

R0
G51
B128
Red0 (0%)
Green51 (20%)
Blue128 (50.2%)
Hue216.09°
Saturation (HSL)100%
Lightness25.1%
Dominant channelBlue
Hex per channelR 00 · G 33 · B 80

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Every value on this page was computed from “hex 003380” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.