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Recognised as Colour

#21A2EF

  • #21A2EF
  • Blue
  • Dark
  • Nearest: Deep skyblue

#21A2EF is a blue with RGB values 33, 162, 239 and HSL 202°, 87%, 53%. It is a dark colour, so black text on it reaches 7.5:1 contrast (AAA for normal text). The nearest named colour is Deep skyblue.

Colour values

#21A2EF#21A2EF
HEX#21A2EF
RGBrgb(33, 162, 239)
RGB (0–1)0.1294, 0.6353, 0.9373
RGB percentages12.9%, 63.5%, 93.7%
HSLhsl(202.4, 86.6%, 53.3%)
HSV / HSBhsv(202.4, 86.2%, 93.7%)
CMYK86.2%, 32.2%, 0%, 6.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,204,399
CSS custom property--colour: #21A2EF;

Brightness & contrast

Relative luminance0.32396WCAG 2.x, 0 is black and 1 is white
Perceived brightness149.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 7.48:1
Contrast with white2.81:1WCAG normal text: Fail
Contrast with black7.48:1WCAG normal text: AAA
Greyscale equivalent#8C8C8C
Inverted#DE5D10

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#7DA4F2no red cones; affects about 1% of men; ΔE 15.1 from the original
Deuteranopia#6192EEno green cones; the most common form, about 1% of men; ΔE 17.7 from the original
Tritanopia#00B5BEno blue cones; rare, and affects men and women equally; ΔE 42.9 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text2.81:1WCAG large text: Fail
Contrast with black, large text7.48:1WCAG large text: AAA

Named colours

Deep skyblue · ΔE 15.3Cornflower blue · ΔE 15.8Steel blue · ΔE 19.3Dodgerblue · ΔE 22.9Light skyblue · ΔE 25.5Sky blue · ΔE 31.9
Nearest named CSS colourDeep skyblue (#00BFFF)ΔE 15.33, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#EF6E21
Analogous#21EFD5, #213BEF
Triadic#EF21A2, #A2EF21
Split complementary#EF213B, #EFD521
Tetradic#D521EF, #EF6E21, #3BEF21

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#DFF2FD
Lighter +30%#B0DEF9
Lighter +20%#80CAF6
Lighter +10%#51B6F2
Darker −10%#0F87CE
Darker −20%#0B689F
Darker −30%#08496F
Darker −40%#05293F
More saturated +25%#11A6FF
Less saturated −25%#3F9AD1

Channel breakdown

R33
G162
B239
Red33 (12.9%)
Green162 (63.5%)
Blue239 (93.7%)
Hue202.43°
Saturation (HSL)86.55%
Lightness53.33%
Dominant channelBlue
Hex per channelR 21 · G A2 · B EF

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Every value on this page was computed from “21a2ef” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.