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Recognised as Colour

#00237C

  • #00237C
  • Blue
  • Dark
  • Nearest: Midnight blue

#00237C is a blue with RGB values 0, 35, 124 and HSL 223°, 100%, 24%. It is a dark colour, so white text on it reaches 13.7:1 contrast (AAA for normal text). The nearest named colour is Midnight blue.

Colour values

#00237C#00237C
HEX#00237C
RGBrgb(0, 35, 124)
RGB (0–1)0, 0.1373, 0.4863
RGB percentages0%, 13.7%, 48.6%
HSLhsl(223.1, 100%, 24.3%)
HSV / HSBhsv(223.1, 100%, 48.6%)
CMYK100%, 71.8%, 0%, 51.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer9,084
CSS custom property--colour: #00237C;

Brightness & contrast

Relative luminance0.02657WCAG 2.x, 0 is black and 1 is white
Perceived brightness49.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 13.71:1
Contrast with white13.71:1WCAG normal text: AAA
Contrast with black1.53:1WCAG normal text: Fail
Greyscale equivalent#222222
Inverted#FFDC83

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#00337Fno red cones; affects about 1% of men; ΔE 12.6 from the original
Deuteranopia#00287Ano green cones; the most common form, about 1% of men; ΔE 5.5 from the original
Tritanopia#003C4Cno blue cones; rare, and affects men and women equally; ΔE 54.6 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text13.71:1WCAG large text: AAA
Contrast with black, large text1.53:1WCAG large text: Fail

Named colours

Midnight blue · ΔE 5.6Dark slateblue · ΔE 16.4Rebecca purple · ΔE 21.3Navy · ΔE 23.5Indigo · ΔE 23.7Dark blue · ΔE 27.7
Nearest named CSS colourMidnight blue (#191970)ΔE 5.56, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#7C5900
Analogous#00617C, #1B007C
Triadic#7C0023, #237C00
Split complementary#7C1B00, #617C00
Tetradic#7C0061, #7C5900, #007C1B

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#497CFF
Lighter +30%#1658FF
Lighter +20%#0040E2
Lighter +10%#0031AF
Darker −10%#001549
Darker −20%#000616
Darker −30%#000000
Darker −40%#000000
More saturated +25%#00237C
Less saturated −25%#102A6D

Channel breakdown

R0
G35
B124
Red0 (0%)
Green35 (13.7%)
Blue124 (48.6%)
Hue223.06°
Saturation (HSL)100%
Lightness24.31%
Dominant channelBlue
Hex per channelR 00 · G 23 · B 7C

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Every value on this page was computed from “00237c” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.