Nerdulator> put something in

Recognised as Colour

#421F27

  • #421F27
  • Red
  • Dark
  • Nearest: Black

#421F27 is a red with RGB values 66, 31, 39 and HSL 346°, 36%, 19%. It is a dark colour, so white text on it reaches 14.4:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#421F27#421F27
HEX#421F27
RGBrgb(66, 31, 39)
RGB (0–1)0.2588, 0.1216, 0.1529
RGB percentages25.9%, 12.2%, 15.3%
HSLhsl(346.3, 36.1%, 19%)
HSV / HSBhsv(346.3, 53%, 25.9%)
CMYK0%, 53%, 40.9%, 74.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,333,351
CSS custom property--colour: #421F27;

Brightness & contrast

Relative luminance0.02285WCAG 2.x, 0 is black and 1 is white
Perceived brightness45.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 14.41:1
Contrast with white14.41:1WCAG normal text: AAA
Contrast with black1.46:1WCAG normal text: Fail
Greyscale equivalent#272727
Inverted#BDE0D8

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#252627no red cones; affects about 1% of men; ΔE 18.5 from the original
Deuteranopia#2E2C26no green cones; the most common form, about 1% of men; ΔE 18.5 from the original
Tritanopia#471C22no blue cones; rare, and affects men and women equally; ΔE 5 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text14.41:1WCAG large text: AAA
Contrast with black, large text1.46:1WCAG large text: Fail

Named colours

Black · ΔE 24.8Dim grey · ΔE 32.9Dark slate grey · ΔE 33.5Gray · ΔE 40.9Slate grey · ΔE 43.1Sienna · ΔE 44.3
Nearest named CSS colourBlack (#000000)ΔE 24.75, a distinctly different colour
Hue familyred
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#1F423A
Analogous#421F39, #42291F
Triadic#27421F, #1F2742
Split complementary#1F4229, #1F3942
Tetradic#39421F, #1F423A, #281F42

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#BC7182
Lighter +30%#AA5065
Lighter +20%#874050
Lighter +10%#652F3C
Darker −10%#1F0F12
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#4E1320
Less saturated −25%#362B2E

Channel breakdown

R66
G31
B39
Red66 (25.9%)
Green31 (12.2%)
Blue39 (15.3%)
Hue346.29°
Saturation (HSL)36.08%
Lightness19.02%
Dominant channelRed
Hex per channelR 42 · G 1F · B 27

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 “421f27” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.