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Recognised as Colour

#000019

  • #000019
  • Blue
  • Dark
  • Nearest: Black

#000019 is a blue with RGB values 0, 0, 25 and HSL 240°, 100%, 5%. It is a dark colour, so white text on it reaches 20.7:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#000019#000019
HEX#000019
RGBrgb(0, 0, 25)
RGB (0–1)0, 0, 0.098
RGB percentages0%, 0%, 9.8%
HSLhsl(240, 100%, 4.9%)
HSV / HSBhsv(240, 100%, 9.8%)
CMYK100%, 100%, 0%, 90.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer25
CSS custom property--colour: #000019;

Brightness & contrast

Relative luminance0.0007WCAG 2.x, 0 is black and 1 is white
Perceived brightness8.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 20.71:1
Contrast with white20.71:1WCAG normal text: AAA
Contrast with black1.01:1WCAG normal text: Fail
Greyscale equivalent#020202
Inverted#FFFFE6

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#00031Ano red cones; affects about 1% of men; ΔE 1.1 from the original
Deuteranopia#000218no green cones; the most common form, about 1% of men; ΔE 1.7 from the original
Tritanopia#00050Ano blue cones; rare, and affects men and women equally; ΔE 11 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text20.71:1WCAG large text: AAA
Contrast with black, large text1.01:1WCAG large text: Fail

Named colours

Black · ΔE 12.9Dark slate grey · ΔE 35.6Dim grey · ΔE 45.6Dark slateblue · ΔE 47.7Midnight blue · ΔE 48.8Slate grey · ΔE 52.6
Nearest named CSS colourBlack (#000000)ΔE 12.93, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#191900
Analogous#000D19, #0D0019
Triadic#190000, #001900
Split complementary#190D00, #0D1900
Tetradic#19000D, #191900, #00190D

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#0000E5
Lighter +30%#0000B2
Lighter +20%#00007F
Lighter +10%#00004C
Darker −10%#000000
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#000019
Less saturated −25%#030316

Channel breakdown

R0
G0
B25
Red0 (0%)
Green0 (0%)
Blue25 (9.8%)
Hue240°
Saturation (HSL)100%
Lightness4.9%
Dominant channelBlue
Hex per channelR 00 · G 00 · B 19

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Every value on this page was computed from “hex 000019” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.