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Recognised as Colour

#001557

  • #001557
  • Blue
  • Dark
  • Nearest: Midnight blue

#001557 is a blue with RGB values 0, 21, 87 and HSL 226°, 100%, 17%. It is a dark colour, so white text on it reaches 16.9:1 contrast (AAA for normal text). The nearest named colour is Midnight blue.

Colour values

#001557#001557
HEX#001557
RGBrgb(0, 21, 87)
RGB (0–1)0, 0.0824, 0.3412
RGB percentages0%, 8.2%, 34.1%
HSLhsl(225.5, 100%, 17.1%)
HSV / HSBhsv(225.5, 100%, 34.1%)
CMYK100%, 75.9%, 0%, 65.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer5,463
CSS custom property--colour: #001557;

Brightness & contrast

Relative luminance0.01224WCAG 2.x, 0 is black and 1 is white
Perceived brightness33.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 16.87:1
Contrast with white16.87:1WCAG normal text: AAA
Contrast with black1.24:1WCAG normal text: Fail
Greyscale equivalent#151515
Inverted#FFEAA8

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#002159no red cones; affects about 1% of men; ΔE 10.2 from the original
Deuteranopia#001956no green cones; the most common form, about 1% of men; ΔE 4.3 from the original
Tritanopia#002834no blue cones; rare, and affects men and women equally; ΔE 43 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text16.87:1WCAG large text: AAA
Contrast with black, large text1.24:1WCAG large text: Fail

Named colours

Midnight blue · ΔE 13.3Dark slateblue · ΔE 20.4Rebecca purple · ΔE 30.6Indigo · ΔE 32.9Navy · ΔE 34.2Dark blue · ΔE 39.2
Nearest named CSS colourMidnight blue (#191970)ΔE 13.26, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#574200
Analogous#004057, #170057
Triadic#570015, #155700
Split complementary#571700, #415700
Tetradic#570040, #574200, #005717

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#2459FF
Lighter +30%#003AF0
Lighter +20%#002EBD
Lighter +10%#00218A
Darker −10%#000924
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#001557
Less saturated −25%#0B1B4C

Channel breakdown

R0
G21
B87
Red0 (0%)
Green21 (8.2%)
Blue87 (34.1%)
Hue225.52°
Saturation (HSL)100%
Lightness17.06%
Dominant channelBlue
Hex per channelR 00 · G 15 · B 57

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Every value on this page was computed from “hex 001557” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.