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Recognised as Colour

#021537

  • #021537
  • Blue
  • Dark
  • Nearest: Black

#021537 is a blue with RGB values 2, 21, 55 and HSL 218°, 93%, 11%. It is a dark colour, so white text on it reaches 18:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#021537#021537
HEX#021537
RGBrgb(2, 21, 55)
RGB (0–1)0.0078, 0.0824, 0.2157
RGB percentages0.8%, 8.2%, 21.6%
HSLhsl(218.5, 93%, 11.2%)
HSV / HSBhsv(218.5, 96.4%, 21.6%)
CMYK96.4%, 61.8%, 0%, 78.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer136,503
CSS custom property--colour: #021537;

Brightness & contrast

Relative luminance0.00825WCAG 2.x, 0 is black and 1 is white
Perceived brightness24.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 18.03:1
Contrast with white18.03:1WCAG normal text: AAA
Contrast with black1.17:1WCAG normal text: Fail
Greyscale equivalent#131313
Inverted#FDEAC8

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#011938no red cones; affects about 1% of men; ΔE 3.6 from the original
Deuteranopia#001436no green cones; the most common form, about 1% of men; ΔE 0.6 from the original
Tritanopia#001D23no blue cones; rare, and affects men and women equally; ΔE 23.6 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text18.03:1WCAG large text: AAA
Contrast with black, large text1.17:1WCAG large text: Fail

Named colours

Black · ΔE 26.8Dark slateblue · ΔE 34.5Midnight blue · ΔE 35.7Dark slate grey · ΔE 37.1Dim grey · ΔE 45Steel blue · ΔE 47.2
Nearest named CSS colourBlack (#000000)ΔE 26.75, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#372402
Analogous#023037, #090237
Triadic#370215, #153702
Split complementary#370902, #303702
Tetradic#370230, #372402, #023709

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#0F62F6
Lighter +30%#074DCB
Lighter +20%#063B99
Lighter +10%#042868
Darker −10%#000206
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#001439
Less saturated −25%#091730

Channel breakdown

R2
G21
B55
Red2 (0.8%)
Green21 (8.2%)
Blue55 (21.6%)
Hue218.49°
Saturation (HSL)92.98%
Lightness11.18%
Dominant channelBlue
Hex per channelR 02 · G 15 · B 37

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Every value on this page was computed from “hex 021537” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.