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Colour

#010131

  • #010131
  • Blue
  • Dark
  • Nearest: Midnight blue

#010131 is a blue with RGB values 1, 1, 49 and HSL 240°, 96%, 10%. It is a dark colour, so white text on it reaches 20:1 contrast (AAA for normal text). The nearest named colour is Midnight blue.

Colour values

#010131#010131
HEX#010131
RGBrgb(1, 1, 49)
RGB (0–1)0.0039, 0.0039, 0.1922
RGB percentages0.4%, 0.4%, 19.2%
HSLhsl(240, 96%, 9.8%)
HSV / HSBhsv(240, 98%, 19.2%)
CMYK98%, 98%, 0%, 80.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer65,841
CSS custom property--colour: #010131;

Brightness & contrast

Relative luminance0.0025WCAG 2.x, 0 is black and 1 is white
Perceived brightness16.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 20:1
Contrast with white20:1WCAG normal text: AAA
Contrast with black1.05:1WCAG normal text: Fail
Greyscale equivalent#040404
Inverted#FEFECE

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#000B32no red cones; affects about 1% of men; ΔE 4.9 from the original
Deuteranopia#000630no green cones; the most common form, about 1% of men; ΔE 3.6 from the original
Tritanopia#000F19no blue cones; rare, and affects men and women equally; ΔE 26.1 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text20:1WCAG large text: AAA
Contrast with black, large text1.05:1WCAG large text: Fail

Named colours

Midnight blue · ΔE 30.8Black · ΔE 31.7Dark slateblue · ΔE 33.9Dark slate grey · ΔE 45.9Rebecca purple · ΔE 46.1Indigo · ΔE 48.8
Nearest named CSS colourMidnight blue (#191970)ΔE 30.81, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#313101
Analogous#011931, #190131
Triadic#310101, #013101
Split complementary#311901, #193101
Tetradic#310119, #313101, #013119

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#0505F9
Lighter +30%#0404C7
Lighter +20%#030395
Lighter +10%#020263
Darker −10%#000000
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#000032
Less saturated −25%#07072B

Channel breakdown

R1
G1
B49
Red1 (0.4%)
Green1 (0.4%)
Blue49 (19.2%)
Hue240°
Saturation (HSL)96%
Lightness9.8%
Dominant channelBlue
Hex per channelR 01 · G 01 · B 31

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Every value on this page was computed from “hex 010131” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.