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Recognised as Colour

#1B4539

  • #1B4539
  • Cyan
  • Dark
  • Nearest: Dark slate grey

#1B4539 is a cyan with RGB values 27, 69, 57 and HSL 163°, 44%, 19%. It is a dark colour, so white text on it reaches 10.7:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#1B4539#1B4539
HEX#1B4539
RGBrgb(27, 69, 57)
RGB (0–1)0.1059, 0.2706, 0.2235
RGB percentages10.6%, 27.1%, 22.4%
HSLhsl(162.9, 43.7%, 18.8%)
HSV / HSBhsv(162.9, 60.9%, 27.1%)
CMYK60.9%, 0%, 17.4%, 72.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,787,193
CSS custom property--colour: #1B4539;

Brightness & contrast

Relative luminance0.04785WCAG 2.x, 0 is black and 1 is white
Perceived brightness58.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.73:1
Contrast with white10.73:1WCAG normal text: AAA
Contrast with black1.96:1WCAG normal text: Fail
Greyscale equivalent#3B3B3B
Inverted#E4BAC6

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#434138no red cones; affects about 1% of men; ΔE 17.4 from the original
Deuteranopia#3C3C3Ano green cones; the most common form, about 1% of men; ΔE 17.7 from the original
Tritanopia#064641no blue cones; rare, and affects men and women equally; ΔE 5.6 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text10.73:1WCAG large text: AAA
Contrast with black, large text1.96:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 10.5Dim grey · ΔE 25.9Teal · ΔE 27.1Dark cyan · ΔE 31.3Black · ΔE 31.9Dark olivegreen · ΔE 32.1
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 10.51, a distinctly different colour
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#451B27
Analogous#1B4524, #1B3C45
Triadic#391B45, #45391B
Split complementary#451B3C, #45241B
Tetradic#241B45, #451B27, #3C451B

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#68C4AA
Lighter +30%#46B394
Lighter +20%#388E76
Lighter +10%#296A57
Darker −10%#0D201B
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#0F513E
Less saturated −25%#273934

Channel breakdown

R27
G69
B57
Red27 (10.6%)
Green69 (27.1%)
Blue57 (22.4%)
Hue162.86°
Saturation (HSL)43.75%
Lightness18.82%
Dominant channelGreen
Hex per channelR 1B · G 45 · B 39

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Every value on this page was computed from “1b4539” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.