Nerdulator> put something in

Recognised as Colour

#183E4D

  • #183E4D
  • Cyan
  • Dark
  • Nearest: Dark slate grey

#183E4D is a cyan with RGB values 24, 62, 77 and HSL 197°, 52%, 20%. 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

#183E4D#183E4D
HEX#183E4D
RGBrgb(24, 62, 77)
RGB (0–1)0.0941, 0.2431, 0.302
RGB percentages9.4%, 24.3%, 30.2%
HSLhsl(197, 52.5%, 19.8%)
HSV / HSBhsv(197, 68.8%, 30.2%)
CMYK68.8%, 19.5%, 0%, 69.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,588,813
CSS custom property--colour: #183E4D;

Brightness & contrast

Relative luminance0.04175WCAG 2.x, 0 is black and 1 is white
Perceived brightness55.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.44:1
Contrast with white11.44:1WCAG normal text: AAA
Contrast with black1.84:1WCAG normal text: Fail
Greyscale equivalent#373737
Inverted#E7C1B2

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#363D4Eno red cones; affects about 1% of men; ΔE 10.1 from the original
Deuteranopia#2F374Dno green cones; the most common form, about 1% of men; ΔE 11.2 from the original
Tritanopia#004243no blue cones; rare, and affects men and women equally; ΔE 12.1 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text11.44:1WCAG large text: AAA
Contrast with black, large text1.84:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 12.3Dim grey · ΔE 25.4Black · ΔE 28.7Slate grey · ΔE 29.3Teal · ΔE 32.1Light slate grey · ΔE 32.3
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 12.28, a distinctly different colour
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#4D2718
Analogous#184D42, #18244D
Triadic#4D183E, #3E4D18
Split complementary#4D1824, #4D4218
Tetradic#42184D, #4D2718, #244D18

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#63B0CE
Lighter +30%#3C9CC2
Lighter +20%#307D9B
Lighter +10%#245D74
Darker −10%#0C1F26
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#0B435A
Less saturated −25%#253940

Channel breakdown

R24
G62
B77
Red24 (9.4%)
Green62 (24.3%)
Blue77 (30.2%)
Hue196.98°
Saturation (HSL)52.48%
Lightness19.8%
Dominant channelBlue
Hex per channelR 18 · G 3E · B 4D

Keep nerding

Every link below is a page Nerdulator can generate from what it already knows about this value.

Nerdulate something else

Nothing in mind? Surprise me · today’s page

Every value on this page was computed from “183e4d” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.