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Recognised as Colour

#0123FF

  • #0123FF
  • Blue
  • Dark
  • Nearest: Blue

#0123FF is a blue with RGB values 1, 35, 255 and HSL 232°, 100%, 50%. It is a dark colour, so white text on it reaches 7.8:1 contrast (AAA for normal text). The nearest named colour is Blue.

Colour values

#0123FF#0123FF
HEX#0123FF
RGBrgb(1, 35, 255)
RGB (0–1)0.0039, 0.1373, 1
RGB percentages0.4%, 13.7%, 100%
HSLhsl(232, 100%, 50.2%)
HSV / HSBhsv(232, 99.6%, 100%)
CMYK99.6%, 86.3%, 0%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer74,751
CSS custom property--colour: #0123FF;

Brightness & contrast

Relative luminance0.08429WCAG 2.x, 0 is black and 1 is white
Perceived brightness90.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.82:1
Contrast with white7.82:1WCAG normal text: AAA
Contrast with black2.69:1WCAG normal text: Fail
Greyscale equivalent#2C2C2C
Inverted#FEDC00

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#005EFFno red cones; affects about 1% of men; ΔE 37.8 from the original
Deuteranopia#0045FCno green cones; the most common form, about 1% of men; ΔE 20.7 from the original
Tritanopia#007098no blue cones; rare, and affects men and women equally; ΔE 111.9 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text7.82:1WCAG large text: AAA
Contrast with black, large text2.69:1WCAG large text: Fail

Named colours

Blue · ΔE 9.3Medium blue · ΔE 16.2Blue violet · ΔE 29.8Dark violet · ΔE 33.9Dark orchid · ΔE 44.8Dark blue · ΔE 45.4
Nearest named CSS colourBlue (#0000FF)ΔE 9.26, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FFDD01
Analogous#01A2FF, #5E01FF
Triadic#FF0123, #23FF01
Split complementary#FF5E01, #A2FF01
Tetradic#FF01A2, #FFDD01, #01FF5E

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#CDD4FF
Lighter +30%#9AA8FF
Lighter +20%#677BFF
Lighter +10%#344FFF
Darker −10%#001BCD
Darker −20%#00159A
Darker −30%#000E67
Darker −40%#000734
More saturated +25%#0123FF
Less saturated −25%#213ADF

Channel breakdown

R1
G35
B255
Red1 (0.4%)
Green35 (13.7%)
Blue255 (100%)
Hue231.97°
Saturation (HSL)100%
Lightness50.2%
Dominant channelBlue
Hex per channelR 01 · G 23 · B FF

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Every value on this page was computed from “0123ff” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.