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Recognised as Colour

#1C3F42

  • #1C3F42
  • Cyan
  • Dark
  • Nearest: Dark slate grey

#1C3F42 is a cyan with RGB values 28, 63, 66 and HSL 185°, 40%, 18%. It is a dark colour, so white text on it reaches 11.4:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#1C3F42#1C3F42
HEX#1C3F42
RGBrgb(28, 63, 66)
RGB (0–1)0.1098, 0.2471, 0.2588
RGB percentages11%, 24.7%, 25.9%
HSLhsl(184.7, 40.4%, 18.4%)
HSV / HSBhsv(184.7, 57.6%, 25.9%)
CMYK57.6%, 4.5%, 0%, 74.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,851,202
CSS custom property--colour: #1C3F42;

Brightness & contrast

Relative luminance0.04195WCAG 2.x, 0 is black and 1 is white
Perceived brightness55.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.42:1
Contrast with white11.42:1WCAG normal text: AAA
Contrast with black1.84:1WCAG normal text: Fail
Greyscale equivalent#383838
Inverted#E3C0BD

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#3A3C42no red cones; affects about 1% of men; ΔE 12.4 from the original
Deuteranopia#343842no green cones; the most common form, about 1% of men; ΔE 12.6 from the original
Tritanopia#034140no blue cones; rare, and affects men and women equally; ΔE 6.5 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text11.42:1WCAG large text: AAA
Contrast with black, large text1.84:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 7.2Dim grey · ΔE 23.9Black · ΔE 27.5Teal · ΔE 29.6Slate grey · ΔE 30.5Gray · ΔE 32
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 7.23, clearly different but related
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#421F1C
Analogous#1C4232, #1C2C42
Triadic#421C3F, #3F421C
Split complementary#421C2C, #42321C
Tetradic#321C42, #421F1C, #2C421C

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#6AB9C0
Lighter +30%#4AA6AD
Lighter +20%#3A838A
Lighter +10%#2B6166
Darker −10%#0D1D1E
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#10494E
Less saturated −25%#283536

Channel breakdown

R28
G63
B66
Red28 (11%)
Green63 (24.7%)
Blue66 (25.9%)
Hue184.74°
Saturation (HSL)40.43%
Lightness18.43%
Dominant channelBlue
Hex per channelR 1C · G 3F · B 42

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Every value on this page was computed from “1c3f42” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.