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Recognised as Colour

#210F17

  • #210F17
  • Red
  • Dark
  • Nearest: Black

#210F17 is a red with RGB values 33, 15, 23 and HSL 333°, 38%, 9%. It is a dark colour, so white text on it reaches 18.3:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#210F17#210F17
HEX#210F17
RGBrgb(33, 15, 23)
RGB (0–1)0.1294, 0.0588, 0.0902
RGB percentages12.9%, 5.9%, 9%
HSLhsl(333.3, 37.5%, 9.4%)
HSV / HSBhsv(333.3, 54.5%, 12.9%)
CMYK0%, 54.5%, 30.3%, 87.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,166,551
CSS custom property--colour: #210F17;

Brightness & contrast

Relative luminance0.00727WCAG 2.x, 0 is black and 1 is white
Perceived brightness22.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 18.33:1
Contrast with white18.33:1WCAG normal text: AAA
Contrast with black1.15:1WCAG normal text: Fail
Greyscale equivalent#131313
Inverted#DEF0E8

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#111317no red cones; affects about 1% of men; ΔE 10.5 from the original
Deuteranopia#151617no green cones; the most common form, about 1% of men; ΔE 10.8 from the original
Tritanopia#230E12no blue cones; rare, and affects men and women equally; ΔE 3.3 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text18.33:1WCAG large text: AAA
Contrast with black, large text1.15:1WCAG large text: Fail

Named colours

Black · ΔE 12.5Dark slate grey · ΔE 33.3Dim grey · ΔE 39.3Gray · ΔE 48.2Slate grey · ΔE 48.8Dark slateblue · ΔE 49.7
Nearest named CSS colourBlack (#000000)ΔE 12.51, a distinctly different colour
Hue familyred
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#0F2119
Analogous#210F20, #21100F
Triadic#17210F, #0F1721
Split complementary#0F2110, #0F2021
Tetradic#20210F, #0F2119, #100F21

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#AD4F79
Lighter +30%#8A3F60
Lighter +20%#672F48
Lighter +10%#441F2F
Darker −10%#000000
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#270916
Less saturated −25%#1B1518

Channel breakdown

R33
G15
B23
Red33 (12.9%)
Green15 (5.9%)
Blue23 (9%)
Hue333.33°
Saturation (HSL)37.5%
Lightness9.41%
Dominant channelRed
Hex per channelR 21 · G 0F · B 17

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Every value on this page was computed from “210f17” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.