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Recognised as Colour

#004243

  • #004243
  • Cyan
  • Dark
  • Nearest: Dark slate grey

#004243 is a cyan with RGB values 0, 66, 67 and HSL 181°, 100%, 13%. It is a dark colour, so white text on it reaches 11.3:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#004243#004243
HEX#004243
RGBrgb(0, 66, 67)
RGB (0–1)0, 0.2588, 0.2627
RGB percentages0%, 25.9%, 26.3%
HSLhsl(180.9, 100%, 13.1%)
HSV / HSBhsv(180.9, 100%, 26.3%)
CMYK100%, 1.5%, 0%, 73.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer16,963
CSS custom property--colour: #004243;

Brightness & contrast

Relative luminance0.04302WCAG 2.x, 0 is black and 1 is white
Perceived brightness55.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.29:1
Contrast with white11.29:1WCAG normal text: AAA
Contrast with black1.86:1WCAG normal text: Fail
Greyscale equivalent#343434
Inverted#FFBDBC

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#3C3E43no red cones; affects about 1% of men; ΔE 18.5 from the original
Deuteranopia#343843no green cones; the most common form, about 1% of men; ΔE 19.1 from the original
Tritanopia#004542no blue cones; rare, and affects men and women equally; ΔE 3.2 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text11.29:1WCAG large text: AAA
Contrast with black, large text1.86:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 9.3Teal · ΔE 26.2Dim grey · ΔE 27.3Dark cyan · ΔE 30.5Black · ΔE 31Slate grey · ΔE 32.6
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 9.3, clearly different but related
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#430100
Analogous#004322, #002143
Triadic#430042, #424300
Split complementary#430020, #432300
Tetradic#230043, #430100, #214300

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#10FBFF
Lighter +30%#00D9DC
Lighter +20%#00A6A9
Lighter +10%#007476
Darker −10%#001010
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#004243
Less saturated −25%#083A3B

Channel breakdown

R0
G66
B67
Red0 (0%)
Green66 (25.9%)
Blue67 (26.3%)
Hue180.9°
Saturation (HSL)100%
Lightness13.14%
Dominant channelBlue
Hex per channelR 00 · G 42 · B 43

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Every value on this page was computed from “hex 004243” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.