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Colour

#000A51

  • #000A51
  • Blue
  • Dark
  • Nearest: Midnight blue

#000A51 is a blue with RGB values 0, 10, 81 and HSL 233°, 100%, 16%. It is a dark colour, so white text on it reaches 18.1:1 contrast (AAA for normal text). The nearest named colour is Midnight blue.

Colour values

#000A51#000A51
HEX#000A51
RGBrgb(0, 10, 81)
RGB (0–1)0, 0.0392, 0.3176
RGB percentages0%, 3.9%, 31.8%
HSLhsl(232.6, 100%, 15.9%)
HSV / HSBhsv(232.6, 100%, 31.8%)
CMYK100%, 87.7%, 0%, 68.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,641
CSS custom property--colour: #000A51;

Brightness & contrast

Relative luminance0.00811WCAG 2.x, 0 is black and 1 is white
Perceived brightness28.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 18.07:1
Contrast with white18.07:1WCAG normal text: AAA
Contrast with black1.16:1WCAG normal text: Fail
Greyscale equivalent#0D0D0D
Inverted#FFF5AE

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#001A53no red cones; affects about 1% of men; ΔE 12.8 from the original
Deuteranopia#001250no green cones; the most common form, about 1% of men; ΔE 7 from the original
Tritanopia#00212Eno blue cones; rare, and affects men and women equally; ΔE 45.9 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text18.07:1WCAG large text: AAA
Contrast with black, large text1.16:1WCAG large text: Fail

Named colours

Midnight blue · ΔE 11.6Dark slateblue · ΔE 23.6Indigo · ΔE 29.4Navy · ΔE 30.1Rebecca purple · ΔE 30.2Dark blue · ΔE 35.2
Nearest named CSS colourMidnight blue (#191970)ΔE 11.57, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#514700
Analogous#003251, #1F0051
Triadic#51000A, #0A5100
Split complementary#511F00, #325100
Tetradic#510032, #514700, #00511F

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#1E3AFF
Lighter +30%#001DEA
Lighter +20%#0017B7
Lighter +10%#001084
Darker −10%#00041E
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#000A51
Less saturated −25%#0A1247

Channel breakdown

R0
G10
B81
Red0 (0%)
Green10 (3.9%)
Blue81 (31.8%)
Hue232.59°
Saturation (HSL)100%
Lightness15.88%
Dominant channelBlue
Hex per channelR 00 · G 0A · B 51

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Every value on this page was computed from “000a51” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.