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Recognised as Colour

#0A0551

  • #0A0551
  • Blue
  • Dark
  • Nearest: Midnight blue

#0A0551 is a blue with RGB values 10, 5, 81 and HSL 244°, 88%, 17%. It is a dark colour, so white text on it reaches 18.2:1 contrast (AAA for normal text). The nearest named colour is Midnight blue.

Colour values

#0A0551#0A0551
HEX#0A0551
RGBrgb(10, 5, 81)
RGB (0–1)0.0392, 0.0196, 0.3176
RGB percentages3.9%, 2%, 31.8%
HSLhsl(243.9, 88.4%, 16.9%)
HSV / HSBhsv(243.9, 93.8%, 31.8%)
CMYK87.7%, 93.8%, 0%, 68.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer656,721
CSS custom property--colour: #0A0551;

Brightness & contrast

Relative luminance0.00767WCAG 2.x, 0 is black and 1 is white
Perceived brightness28.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 18.21:1
Contrast with white18.21:1WCAG normal text: AAA
Contrast with black1.15:1WCAG normal text: Fail
Greyscale equivalent#0C0C0C
Inverted#F5FAAE

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#001953no red cones; affects about 1% of men; ΔE 15.2 from the original
Deuteranopia#001150no green cones; the most common form, about 1% of men; ΔE 9.6 from the original
Tritanopia#001E2Dno blue cones; rare, and affects men and women equally; ΔE 46.9 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text18.21:1WCAG large text: AAA
Contrast with black, large text1.15:1WCAG large text: Fail

Named colours

Midnight blue · ΔE 10.7Dark slateblue · ΔE 24.5Indigo · ΔE 26.5Navy · ΔE 27.4Rebecca purple · ΔE 28.8Dark blue · ΔE 32.6
Nearest named CSS colourMidnight blue (#191970)ΔE 10.72, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#4C5105
Analogous#052651, #300551
Triadic#510A05, #05510A
Split complementary#513005, #265105
Tetradic#510526, #4C5105, #055130

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#3D30F2
Lighter +30%#1C0EE1
Lighter +20%#160BB1
Lighter +10%#100881
Darker −10%#040221
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#060056
Less saturated −25%#131046

Channel breakdown

R10
G5
B81
Red10 (3.9%)
Green5 (2%)
Blue81 (31.8%)
Hue243.95°
Saturation (HSL)88.37%
Lightness16.86%
Dominant channelBlue
Hex per channelR 0A · G 05 · B 51

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Every value on this page was computed from “0a0551” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.