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Recognised as Colour

#001C81

  • #001C81
  • Blue
  • Dark
  • Nearest: Midnight blue

#001C81 is a blue with RGB values 0, 28, 129 and HSL 227°, 100%, 25%. It is a dark colour, so white text on it reaches 14.2:1 contrast (AAA for normal text). The nearest named colour is Midnight blue.

Colour values

#001C81#001C81
HEX#001C81
RGBrgb(0, 28, 129)
RGB (0–1)0, 0.1098, 0.5059
RGB percentages0%, 11%, 50.6%
HSLhsl(227, 100%, 25.3%)
HSV / HSBhsv(227, 100%, 50.6%)
CMYK100%, 78.3%, 0%, 49.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer7,297
CSS custom property--colour: #001C81;

Brightness & contrast

Relative luminance0.02415WCAG 2.x, 0 is black and 1 is white
Perceived brightness48.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 14.16:1
Contrast with white14.16:1WCAG normal text: AAA
Contrast with black1.48:1WCAG normal text: Fail
Greyscale equivalent#1D1D1D
Inverted#FFE37E

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#003184no red cones; affects about 1% of men; ΔE 16.1 from the original
Deuteranopia#00257Fno green cones; the most common form, about 1% of men; ΔE 8.3 from the original
Tritanopia#003B4Dno blue cones; rare, and affects men and women equally; ΔE 61.3 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text14.16:1WCAG large text: AAA
Contrast with black, large text1.48:1WCAG large text: Fail

Named colours

Midnight blue · ΔE 8.9Navy · ΔE 15.3Indigo · ΔE 17.8Dark blue · ΔE 19.4Rebecca purple · ΔE 20.4Dark slateblue · ΔE 22.3
Nearest named CSS colourMidnight blue (#191970)ΔE 8.85, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#816500
Analogous#005C81, #250081
Triadic#81001C, #1C8100
Split complementary#812500, #5C8100
Tetradic#81005C, #816500, #008125

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#4E74FF
Lighter +30%#1B4CFF
Lighter +20%#0032E7
Lighter +10%#0027B4
Darker −10%#00114E
Darker −20%#00061B
Darker −30%#000000
Darker −40%#000000
More saturated +25%#001C81
Less saturated −25%#102571

Channel breakdown

R0
G28
B129
Red0 (0%)
Green28 (11%)
Blue129 (50.6%)
Hue226.98°
Saturation (HSL)100%
Lightness25.29%
Dominant channelBlue
Hex per channelR 00 · G 1C · B 81

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Every value on this page was computed from “001c81” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.