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Colour

#0063FF

  • #0063FF
  • Blue
  • Dark
  • Nearest: Medium slateblue

#0063FF is a blue with RGB values 0, 99, 255 and HSL 217°, 100%, 50%. It is a dark colour, so white text on it reaches 5:1 contrast (AA for normal text). The nearest named colour is Medium slateblue.

Colour values

#0063FF#0063FF
HEX#0063FF
RGBrgb(0, 99, 255)
RGB (0–1)0, 0.3882, 1
RGB percentages0%, 38.8%, 100%
HSLhsl(216.7, 100%, 50%)
HSV / HSBhsv(216.7, 100%, 100%)
CMYK100%, 61.2%, 0%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer25,599
CSS custom property--colour: #0063FF;

Brightness & contrast

Relative luminance0.16144WCAG 2.x, 0 is black and 1 is white
Perceived brightness114.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 4.97:1
Contrast with white4.97:1WCAG normal text: AA
Contrast with black4.23:1WCAG normal text: Fail
Greyscale equivalent#595959
Inverted#FF9C00

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#007BFFno red cones; affects about 1% of men; ΔE 19.3 from the original
Deuteranopia#0065FCno green cones; the most common form, about 1% of men; ΔE 3.2 from the original
Tritanopia#008CA8no blue cones; rare, and affects men and women equally; ΔE 83.7 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text4.97:1WCAG large text: AAA
Contrast with black, large text4.23:1WCAG large text: AA

Named colours

Medium slateblue · ΔE 18.9Royal blue · ΔE 21Slate blue · ΔE 25.5Medium purple · ΔE 34.1Blue violet · ΔE 34.2Dodgerblue · ΔE 35.8
Nearest named CSS colourMedium slateblue (#7B68EE)ΔE 18.94, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FF9C00
Analogous#00E2FF, #1D00FF
Triadic#FF0063, #63FF00
Split complementary#FF1D00, #E2FF00
Tetradic#FF00E2, #FF9C00, #00FF1D

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#CCE0FF
Lighter +30%#99C1FF
Lighter +20%#66A1FF
Lighter +10%#3382FF
Darker −10%#004FCC
Darker −20%#003B99
Darker −30%#002866
Darker −40%#001433
More saturated +25%#0063FF
Less saturated −25%#206ADF

Channel breakdown

R0
G99
B255
Red0 (0%)
Green99 (38.8%)
Blue255 (100%)
Hue216.71°
Saturation (HSL)100%
Lightness50%
Dominant channelBlue
Hex per channelR 00 · G 63 · B FF

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Every value on this page was computed from “0063ff” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.