Nerdulator> put something in

Recognised as Colour

#21504B

  • #21504B
  • Cyan
  • Dark
  • Nearest: Dark slate grey

#21504B is a cyan with RGB values 33, 80, 75 and HSL 174°, 42%, 22%. It is a dark colour, so white text on it reaches 9.1:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#21504B#21504B
HEX#21504B
RGBrgb(33, 80, 75)
RGB (0–1)0.1294, 0.3137, 0.2941
RGB percentages12.9%, 31.4%, 29.4%
HSLhsl(173.6, 41.6%, 22.2%)
HSV / HSBhsv(173.6, 58.7%, 31.4%)
CMYK58.8%, 0%, 6.2%, 68.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,183,243
CSS custom property--colour: #21504B;

Brightness & contrast

Relative luminance0.06569WCAG 2.x, 0 is black and 1 is white
Perceived brightness68.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 9.08:1
Contrast with white9.08:1WCAG normal text: AAA
Contrast with black2.31:1WCAG normal text: Fail
Greyscale equivalent#464646
Inverted#DEAFB4

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#4C4C4Bno red cones; affects about 1% of men; ΔE 17.4 from the original
Deuteranopia#44464Cno green cones; the most common form, about 1% of men; ΔE 18.1 from the original
Tritanopia#01524Eno blue cones; rare, and affects men and women equally; ΔE 5.4 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text9.08:1WCAG large text: AAA
Contrast with black, large text2.31:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 5.9Teal · ΔE 21.9Dim grey · ΔE 22.1Dark cyan · ΔE 26.2Slate grey · ΔE 28.1Gray · ΔE 28.7
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 5.95, clearly different but related
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#502126
Analogous#215034, #213D50
Triadic#4B2150, #504B21
Split complementary#50213D, #503421
Tetradic#342150, #502126, #3D5021

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#76C7BE
Lighter +30%#52B8AD
Lighter +20%#3F988F
Lighter +10%#30746D
Darker −10%#122C29
Darker −20%#030807
Darker −30%#000000
Darker −40%#000000
More saturated +25%#135E56
Less saturated −25%#2F4240

Channel breakdown

R33
G80
B75
Red33 (12.9%)
Green80 (31.4%)
Blue75 (29.4%)
Hue173.62°
Saturation (HSL)41.59%
Lightness22.16%
Dominant channelGreen
Hex per channelR 21 · G 50 · B 4B

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 “21504b” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.