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Colour

#0000B1

  • #0000B1
  • Blue
  • Dark
  • Nearest: Medium blue

#0000B1 is a blue with RGB values 0, 0, 177 and HSL 240°, 100%, 35%. It is a dark colour, so white text on it reaches 12.8:1 contrast (AAA for normal text). The nearest named colour is Medium blue.

Colour values

#0000B1#0000B1
HEX#0000B1
RGBrgb(0, 0, 177)
RGB (0–1)0, 0, 0.6941
RGB percentages0%, 0%, 69.4%
HSLhsl(240, 100%, 34.7%)
HSV / HSBhsv(240, 100%, 69.4%)
CMYK100%, 100%, 0%, 30.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer177
CSS custom property--colour: #0000B1;

Brightness & contrast

Relative luminance0.03174WCAG 2.x, 0 is black and 1 is white
Perceived brightness59.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 12.85:1
Contrast with white12.85:1WCAG normal text: AAA
Contrast with black1.63:1WCAG normal text: Fail
Greyscale equivalent#0D0D0D
Inverted#FFFF4E

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#003BB5no red cones; affects about 1% of men; ΔE 30.8 from the original
Deuteranopia#0028AFno green cones; the most common form, about 1% of men; ΔE 19.1 from the original
Tritanopia#004866no blue cones; rare, and affects men and women equally; ΔE 90.2 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text12.85:1WCAG large text: AAA
Contrast with black, large text1.63:1WCAG large text: Fail

Named colours

Medium blue · ΔE 12.5Dark blue · ΔE 17.6Navy · ΔE 22.8Blue violet · ΔE 24.6Dark violet · ΔE 27.4Indigo · ΔE 29.9
Nearest named CSS colourMedium blue (#0000CD)ΔE 12.51, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#B1B100
Analogous#0059B1, #5900B1
Triadic#B10000, #00B100
Split complementary#B15900, #59B100
Tetradic#B10059, #B1B100, #00B159

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#7E7EFF
Lighter +30%#4B4BFF
Lighter +20%#1818FF
Lighter +10%#0000E4
Darker −10%#00007E
Darker −20%#00004B
Darker −30%#000018
Darker −40%#000000
More saturated +25%#0000B1
Less saturated −25%#16169B

Channel breakdown

R0
G0
B177
Red0 (0%)
Green0 (0%)
Blue177 (69.4%)
Hue240°
Saturation (HSL)100%
Lightness34.71%
Dominant channelBlue
Hex per channelR 00 · G 00 · B B1

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Every value on this page was computed from “0000b1” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.