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Colour

#017FFF

  • #017FFF
  • Blue
  • Dark
  • Nearest: Royal blue

#017FFF is a blue with RGB values 1, 127, 255 and HSL 210°, 100%, 50%. It is a dark colour, so black text on it reaches 5.5:1 contrast (AA for normal text). The nearest named colour is Royal blue.

Colour values

#017FFF#017FFF
HEX#017FFF
RGBrgb(1, 127, 255)
RGB (0–1)0.0039, 0.498, 1
RGB percentages0.4%, 49.8%, 100%
HSLhsl(210.2, 100%, 50.2%)
HSV / HSBhsv(210.2, 99.6%, 100%)
CMYK99.6%, 50.2%, 0%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer98,303
CSS custom property--colour: #017FFF;

Brightness & contrast

Relative luminance0.22405WCAG 2.x, 0 is black and 1 is white
Perceived brightness129.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.48:1
Contrast with white3.83:1WCAG normal text: Fail
Contrast with black5.48:1WCAG normal text: AA
Greyscale equivalent#6D6D6D
Inverted#FE8000

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#258DFFno red cones; affects about 1% of men; ΔE 10.8 from the original
Deuteranopia#0079FDno green cones; the most common form, about 1% of men; ΔE 3.9 from the original
Tritanopia#009FB3no blue cones; rare, and affects men and women equally; ΔE 69.5 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3.83:1WCAG large text: AA
Contrast with black, large text5.48:1WCAG large text: AAA

Named colours

Royal blue · ΔE 11.3Dodgerblue · ΔE 13.3Medium slateblue · ΔE 22.6Slate blue · ΔE 23.3Cornflower blue · ΔE 25.4Medium purple · ΔE 27.5
Nearest named CSS colourRoyal blue (#4169E1)ΔE 11.3, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FF8101
Analogous#01FEFF, #0201FF
Triadic#FF017F, #7FFF01
Split complementary#FF0201, #FEFF01
Tetradic#FF01FE, #FF8101, #01FF02

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#CDE6FF
Lighter +30%#9ACCFF
Lighter +20%#67B2FF
Lighter +10%#3499FF
Darker −10%#0066CD
Darker −20%#004C9A
Darker −30%#003367
Darker −40%#001A34
More saturated +25%#017FFF
Less saturated −25%#217FDF

Channel breakdown

R1
G127
B255
Red1 (0.4%)
Green127 (49.8%)
Blue255 (100%)
Hue210.24°
Saturation (HSL)100%
Lightness50.2%
Dominant channelBlue
Hex per channelR 01 · G 7F · B FF

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Every value on this page was computed from “017fff” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.