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Colour

#2101FF

  • #2101FF
  • Blue
  • Dark
  • Nearest: Blue

#2101FF is a blue with RGB values 33, 1, 255 and HSL 248°, 100%, 50%. It is a dark colour, so white text on it reaches 8.4:1 contrast (AAA for normal text). The nearest named colour is Blue.

Colour values

#2101FF#2101FF
HEX#2101FF
RGBrgb(33, 1, 255)
RGB (0–1)0.1294, 0.0039, 1
RGB percentages12.9%, 0.4%, 100%
HSLhsl(247.6, 100%, 50.2%)
HSV / HSBhsv(247.6, 99.6%, 100%)
CMYK87.1%, 99.6%, 0%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,163,199
CSS custom property--colour: #2101FF;

Brightness & contrast

Relative luminance0.07565WCAG 2.x, 0 is black and 1 is white
Perceived brightness88 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 8.36:1
Contrast with white8.36:1WCAG normal text: AAA
Contrast with black2.51:1WCAG normal text: Fail
Greyscale equivalent#1A1A1A
Inverted#DEFE00

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#005AFFno red cones; affects about 1% of men; ΔE 43.2 from the original
Deuteranopia#0040FBno green cones; the most common form, about 1% of men; ΔE 26.2 from the original
Tritanopia#006B96no blue cones; rare, and affects men and women equally; ΔE 117.2 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text8.36:1WCAG large text: AAA
Contrast with black, large text2.51:1WCAG large text: Fail

Named colours

Blue · ΔE 1.5Medium blue · ΔE 20.9Blue violet · ΔE 34.4Dark violet · ΔE 36.9Dark orchid · ΔE 49.7Dark blue · ΔE 51
Nearest named CSS colourBlue (#0000FF)ΔE 1.49, below the just-noticeable difference
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#DFFF01
Analogous#0160FF, #A001FF
Triadic#FF2101, #01FF21
Split complementary#FFA001, #60FF01
Tetradic#FF0160, #DFFF01, #01FFA0

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#D3CDFF
Lighter +30%#A79AFF
Lighter +20%#7A67FF
Lighter +10%#4E34FF
Darker −10%#1A00CD
Darker −20%#13009A
Darker −30%#0D0067
Darker −40%#070034
More saturated +25%#2101FF
Less saturated −25%#3921DF

Channel breakdown

R33
G1
B255
Red33 (12.9%)
Green1 (0.4%)
Blue255 (100%)
Hue247.56°
Saturation (HSL)100%
Lightness50.2%
Dominant channelBlue
Hex per channelR 21 · G 01 · B FF

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Every value on this page was computed from “2101ff” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.