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Recognised as Colour

#01308A

  • #01308A
  • Blue
  • Dark
  • Nearest: Midnight blue

#01308A is a blue with RGB values 1, 48, 138 and HSL 219°, 99%, 27%. It is a dark colour, so white text on it reaches 11.7:1 contrast (AAA for normal text). The nearest named colour is Midnight blue.

Colour values

#01308A#01308A
HEX#01308A
RGBrgb(1, 48, 138)
RGB (0–1)0.0039, 0.1882, 0.5412
RGB percentages0.4%, 18.8%, 54.1%
HSLhsl(219.4, 98.6%, 27.3%)
HSV / HSBhsv(219.4, 99.3%, 54.1%)
CMYK99.3%, 65.2%, 0%, 45.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer77,962
CSS custom property--colour: #01308A;

Brightness & contrast

Relative luminance0.03955WCAG 2.x, 0 is black and 1 is white
Perceived brightness59.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.72:1
Contrast with white11.72:1WCAG normal text: AAA
Contrast with black1.79:1WCAG normal text: Fail
Greyscale equivalent#2D2D2D
Inverted#FECF75

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#003E8Dno red cones; affects about 1% of men; ΔE 10.9 from the original
Deuteranopia#003288no green cones; the most common form, about 1% of men; ΔE 3 from the original
Tritanopia#004858no blue cones; rare, and affects men and women equally; ΔE 54.3 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text11.72:1WCAG large text: AAA
Contrast with black, large text1.79:1WCAG large text: Fail

Named colours

Midnight blue · ΔE 11Dark slateblue · ΔE 13.6Rebecca purple · ΔE 21.3Slate blue · ΔE 24.9Indigo · ΔE 27Royal blue · ΔE 27
Nearest named CSS colourMidnight blue (#191970)ΔE 11.02, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#8A5B01
Analogous#01758A, #16018A
Triadic#8A0130, #308A01
Split complementary#8A1701, #748A01
Tetradic#8A0175, #8A5B01, #018A16

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#5992FE
Lighter +30%#2770FD
Lighter +20%#0253EF
Lighter +10%#0142BD
Darker −10%#011E57
Darker −20%#000D25
Darker −30%#000000
Darker −40%#000000
More saturated +25%#00308B
Less saturated −25%#123579

Channel breakdown

R1
G48
B138
Red1 (0.4%)
Green48 (18.8%)
Blue138 (54.1%)
Hue219.42°
Saturation (HSL)98.56%
Lightness27.25%
Dominant channelBlue
Hex per channelR 01 · G 30 · B 8A

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Every value on this page was computed from “01308a” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.