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Recognised as Colour

#1B2B6E

  • #1B2B6E
  • Blue
  • Dark
  • Nearest: Dark slateblue

#1B2B6E is a blue with RGB values 27, 43, 110 and HSL 228°, 61%, 27%. It is a dark colour, so white text on it reaches 13:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#1B2B6E#1B2B6E
HEX#1B2B6E
RGBrgb(27, 43, 110)
RGB (0–1)0.1059, 0.1686, 0.4314
RGB percentages10.6%, 16.9%, 43.1%
HSLhsl(228.4, 60.6%, 26.9%)
HSV / HSBhsv(228.4, 75.5%, 43.1%)
CMYK75.5%, 60.9%, 0%, 56.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,780,590
CSS custom property--colour: #1B2B6E;

Brightness & contrast

Relative luminance0.03087WCAG 2.x, 0 is black and 1 is white
Perceived brightness51.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 12.98:1
Contrast with white12.98:1WCAG normal text: AAA
Contrast with black1.62:1WCAG normal text: Fail
Greyscale equivalent#2C2C2C
Inverted#E4D491

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#003570no red cones; affects about 1% of men; ΔE 9.7 from the original
Deuteranopia#002D6Dno green cones; the most common form, about 1% of men; ΔE 4.6 from the original
Tritanopia#003C48no blue cones; rare, and affects men and women equally; ΔE 42.5 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text12.98:1WCAG large text: AAA
Contrast with black, large text1.62:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 12.7Midnight blue · ΔE 16.1Rebecca purple · ΔE 27.7Slate blue · ΔE 34.7Indigo · ΔE 35Royal blue · ΔE 37.5
Nearest named CSS colourDark slateblue (#483D8B)ΔE 12.69, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#6E5E1B
Analogous#1B556E, #341B6E
Triadic#6E1B2B, #2B6E1B
Split complementary#6E341B, #556E1B
Tetradic#6E1B55, #6E5E1B, #1B6E34

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#778BDE
Lighter +30%#4E68D4
Lighter +20%#2F4BC0
Lighter +10%#253B97
Darker −10%#111B45
Darker −20%#070B1C
Darker −30%#000000
Darker −40%#000000
More saturated +25%#0A207F
Less saturated −25%#2C365D

Channel breakdown

R27
G43
B110
Red27 (10.6%)
Green43 (16.9%)
Blue110 (43.1%)
Hue228.43°
Saturation (HSL)60.58%
Lightness26.86%
Dominant channelBlue
Hex per channelR 1B · G 2B · B 6E

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Every value on this page was computed from “1b2b6e” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.