Nerdulator> put something in

Recognised as Colour

#21ABDF

  • #21ABDF
  • Cyan
  • Dark
  • Nearest: Deep skyblue

#21ABDF is a cyan with RGB values 33, 171, 223 and HSL 196°, 75%, 50%. It is a dark colour, so black text on it reaches 8:1 contrast (AAA for normal text). The nearest named colour is Deep skyblue.

Colour values

#21ABDF#21ABDF
HEX#21ABDF
RGBrgb(33, 171, 223)
RGB (0–1)0.1294, 0.6706, 0.8745
RGB percentages12.9%, 67.1%, 87.5%
HSLhsl(196.4, 74.8%, 50.2%)
HSV / HSBhsv(196.4, 85.2%, 87.5%)
CMYK85.2%, 23.3%, 0%, 12.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,206,687
CSS custom property--colour: #21ABDF;

Brightness & contrast

Relative luminance0.34777WCAG 2.x, 0 is black and 1 is white
Perceived brightness152.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 7.96:1
Contrast with white2.64:1WCAG normal text: Fail
Contrast with black7.96:1WCAG normal text: AAA
Greyscale equivalent#919191
Inverted#DE5420

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#90A9E1no red cones; affects about 1% of men; ΔE 22.6 from the original
Deuteranopia#7898DEno green cones; the most common form, about 1% of men; ΔE 24.6 from the original
Tritanopia#00B9BCno blue cones; rare, and affects men and women equally; ΔE 30.8 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text2.64:1WCAG large text: Fail
Contrast with black, large text7.96:1WCAG large text: AAA

Named colours

Deep skyblue · ΔE 9.6Light skyblue · ΔE 17.1Steel blue · ΔE 18.7Sky blue · ΔE 20.2Light steelblue · ΔE 29Cadetblue · ΔE 29
Nearest named CSS colourDeep skyblue (#00BFFF)ΔE 9.59, clearly different but related
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#DF5521
Analogous#21DFB4, #214CDF
Triadic#DF21AB, #ABDF21
Split complementary#DF214C, #DFB421
Tetradic#B421DF, #DF5521, #4CDF21

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#D3EEF9
Lighter +30%#A7DEF2
Lighter +20%#7ACDEC
Lighter +10%#4EBCE5
Darker −10%#1A89B3
Darker −20%#136787
Darker −30%#0D455A
Darker −40%#07232D
More saturated +25%#01B9FF
Less saturated −25%#419DBF

Channel breakdown

R33
G171
B223
Red33 (12.9%)
Green171 (67.1%)
Blue223 (87.5%)
Hue196.42°
Saturation (HSL)74.8%
Lightness50.2%
Dominant channelBlue
Hex per channelR 21 · G AB · B DF

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 “21abdf” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.