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Colour

#003DB4

  • #003DB4
  • Blue
  • Dark
  • Nearest: Slate blue

#003DB4 is a blue with RGB values 0, 61, 180 and HSL 220°, 100%, 35%. It is a dark colour, so white text on it reaches 9:1 contrast (AAA for normal text). The nearest named colour is Slate blue.

Colour values

#003DB4#003DB4
HEX#003DB4
RGBrgb(0, 61, 180)
RGB (0–1)0, 0.2392, 0.7059
RGB percentages0%, 23.9%, 70.6%
HSLhsl(219.7, 100%, 35.3%)
HSV / HSBhsv(219.7, 100%, 70.6%)
CMYK100%, 66.1%, 0%, 29.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer15,796
CSS custom property--colour: #003DB4;

Brightness & contrast

Relative luminance0.06633WCAG 2.x, 0 is black and 1 is white
Perceived brightness76.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 9.03:1
Contrast with white9.03:1WCAG normal text: AAA
Contrast with black2.33:1WCAG normal text: Fail
Greyscale equivalent#393939
Inverted#FFC24B

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0051B8no red cones; affects about 1% of men; ΔE 14.9 from the original
Deuteranopia#0041B2no green cones; the most common form, about 1% of men; ΔE 4.4 from the original
Tritanopia#005E73no blue cones; rare, and affects men and women equally; ΔE 68.6 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text9.03:1WCAG large text: AAA
Contrast with black, large text2.33:1WCAG large text: Fail

Named colours

Slate blue · ΔE 17.3Royal blue · ΔE 18.2Rebecca purple · ΔE 22.2Medium slateblue · ΔE 22.8Midnight blue · ΔE 23Navy · ΔE 23.3
Nearest named CSS colourSlate blue (#6A5ACD)ΔE 17.29, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#B47700
Analogous#0097B4, #1D00B4
Triadic#B4003D, #3DB400
Split complementary#B41D00, #97B400
Tetradic#B40097, #B47700, #00B41D

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#81ACFF
Lighter +30%#4E8AFF
Lighter +20%#1B68FF
Lighter +10%#004EE7
Darker −10%#002C81
Darker −20%#001A4E
Darker −30%#00091B
Darker −40%#000000
More saturated +25%#003DB4
Less saturated −25%#17449E

Channel breakdown

R0
G61
B180
Red0 (0%)
Green61 (23.9%)
Blue180 (70.6%)
Hue219.67°
Saturation (HSL)100%
Lightness35.29%
Dominant channelBlue
Hex per channelR 00 · G 3D · B B4

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Every value on this page was computed from “003db4” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.