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Colour

#017BFF

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

#017BFF is a blue with RGB values 1, 123, 255 and HSL 211°, 100%, 50%. It is a dark colour, so black text on it reaches 5.3:1 contrast (AA for normal text). The nearest named colour is Royal blue.

Colour values

#017BFF#017BFF
HEX#017BFF
RGBrgb(1, 123, 255)
RGB (0–1)0.0039, 0.4824, 1
RGB percentages0.4%, 48.2%, 100%
HSLhsl(211.2, 100%, 50.2%)
HSV / HSBhsv(211.2, 99.6%, 100%)
CMYK99.6%, 51.8%, 0%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer97,279
CSS custom property--colour: #017BFF;

Brightness & contrast

Relative luminance0.21392WCAG 2.x, 0 is black and 1 is white
Perceived brightness127.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.28:1
Contrast with white3.98:1WCAG normal text: Fail
Contrast with black5.28:1WCAG normal text: AA
Greyscale equivalent#6B6B6B
Inverted#FE8400

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0C8AFFno red cones; affects about 1% of men; ΔE 12 from the original
Deuteranopia#0076FCno green cones; the most common form, about 1% of men; ΔE 2.7 from the original
Tritanopia#009CB1no blue cones; rare, and affects men and women equally; ΔE 71.6 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3.98:1WCAG large text: AA
Contrast with black, large text5.28:1WCAG large text: AAA

Named colours

Royal blue · ΔE 10.5Dodgerblue · ΔE 16.5Medium slateblue · ΔE 20.7Slate blue · ΔE 22.3Medium purple · ΔE 27.4Cornflower blue · ΔE 28.3
Nearest named CSS colourRoyal blue (#4169E1)ΔE 10.53, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FF8501
Analogous#01FAFF, #0601FF
Triadic#FF017B, #7BFF01
Split complementary#FF0601, #FAFF01
Tetradic#FF01FA, #FF8501, #01FF06

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#CDE5FF
Lighter +30%#9ACBFF
Lighter +20%#67B0FF
Lighter +10%#3496FF
Darker −10%#0062CD
Darker −20%#004A9A
Darker −30%#003167
Darker −40%#001934
More saturated +25%#017BFF
Less saturated −25%#217CDF

Channel breakdown

R1
G123
B255
Red1 (0.4%)
Green123 (48.2%)
Blue255 (100%)
Hue211.18°
Saturation (HSL)100%
Lightness50.2%
Dominant channelBlue
Hex per channelR 01 · G 7B · B FF

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