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Recognised as Colour

#21ADFA

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

#21ADFA is a blue with RGB values 33, 173, 250 and HSL 201°, 96%, 55%. It is a dark colour, so black text on it reaches 8.4:1 contrast (AAA for normal text). The nearest named colour is Deep skyblue.

Colour values

#21ADFA#21ADFA
HEX#21ADFA
RGBrgb(33, 173, 250)
RGB (0–1)0.1294, 0.6784, 0.9804
RGB percentages12.9%, 67.8%, 98%
HSLhsl(201.3, 95.6%, 55.5%)
HSV / HSBhsv(201.3, 86.8%, 98%)
CMYK86.8%, 30.8%, 0%, 2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,207,226
CSS custom property--colour: #21ADFA;

Brightness & contrast

Relative luminance0.37113WCAG 2.x, 0 is black and 1 is white
Perceived brightness158.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 8.42:1
Contrast with white2.49:1WCAG normal text: Fail
Contrast with black8.42:1WCAG normal text: AAA
Greyscale equivalent#959595
Inverted#DE5205

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#88AEFDno red cones; affects about 1% of men; ΔE 17.3 from the original
Deuteranopia#6B9CF9no green cones; the most common form, about 1% of men; ΔE 19.5 from the original
Tritanopia#00C0C8no blue cones; rare, and affects men and women equally; ΔE 43 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text2.49:1WCAG large text: Fail
Contrast with black, large text8.42:1WCAG large text: AAA

Named colours

Deep skyblue · ΔE 11.8Cornflower blue · ΔE 18.7Steel blue · ΔE 22.1Light skyblue · ΔE 23.2Dodgerblue · ΔE 25.4Sky blue · ΔE 29.9
Nearest named CSS colourDeep skyblue (#00BFFF)ΔE 11.82, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FA6E21
Analogous#21FADA, #2141FA
Triadic#FA21AD, #ADFA21
Split complementary#FA2141, #FADA21
Tetradic#DA21FA, #FA6E21, #41FA21

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#E9F7FE
Lighter +30%#B7E4FD
Lighter +20%#85D2FC
Lighter +10%#53BFFB
Darker −10%#0594E3
Darker −20%#0474B1
Darker −30%#03537F
Darker −40%#02324D
More saturated +25%#1CAEFF
Less saturated −25%#3DA5DE

Channel breakdown

R33
G173
B250
Red33 (12.9%)
Green173 (67.8%)
Blue250 (98%)
Hue201.29°
Saturation (HSL)95.59%
Lightness55.49%
Dominant channelBlue
Hex per channelR 21 · G AD · B FA

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