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Colour

#003DB3

  • #003DB3
  • Blue
  • Dark
  • Nearest: Slate blue

#003DB3 is a blue with RGB values 0, 61, 179 and HSL 220°, 100%, 35%. It is a dark colour, so white text on it reaches 9.1:1 contrast (AAA for normal text). The nearest named colour is Slate blue.

Colour values

#003DB3#003DB3
HEX#003DB3
RGBrgb(0, 61, 179)
RGB (0–1)0, 0.2392, 0.702
RGB percentages0%, 23.9%, 70.2%
HSLhsl(219.6, 100%, 35.1%)
HSV / HSBhsv(219.6, 100%, 70.2%)
CMYK100%, 65.9%, 0%, 29.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer15,795
CSS custom property--colour: #003DB3;

Brightness & contrast

Relative luminance0.06592WCAG 2.x, 0 is black and 1 is white
Perceived brightness76.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 9.06:1
Contrast with white9.06:1WCAG normal text: AAA
Contrast with black2.32:1WCAG normal text: Fail
Greyscale equivalent#393939
Inverted#FFC24C

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0051B7no red cones; affects about 1% of men; ΔE 14.9 from the original
Deuteranopia#0041B1no green cones; the most common form, about 1% of men; ΔE 4.4 from the original
Tritanopia#005D72no blue cones; rare, and affects men and women equally; ΔE 67.9 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text9.06:1WCAG large text: AAA
Contrast with black, large text2.32:1WCAG large text: Fail

Named colours

Slate blue · ΔE 17.2Royal blue · ΔE 18.1Rebecca purple · ΔE 22Midnight blue · ΔE 22.6Medium slateblue · ΔE 23Navy · ΔE 23.4
Nearest named CSS colourSlate blue (#6A5ACD)ΔE 17.22, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#B37600
Analogous#0097B3, #1C00B3
Triadic#B3003D, #3DB300
Split complementary#B31C00, #97B300
Tetradic#B30097, #B37600, #00B31C

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#80ABFF
Lighter +30%#4D8AFF
Lighter +20%#1A68FF
Lighter +10%#004EE6
Darker −10%#002C80
Darker −20%#001A4D
Darker −30%#00091A
Darker −40%#000000
More saturated +25%#003DB3
Less saturated −25%#16449D

Channel breakdown

R0
G61
B179
Red0 (0%)
Green61 (23.9%)
Blue179 (70.2%)
Hue219.55°
Saturation (HSL)100%
Lightness35.1%
Dominant channelBlue
Hex per channelR 00 · G 3D · B B3

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Every value on this page was computed from “003db3” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.