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Recognised as Colour

#1B2F4A

  • #1B2F4A
  • Blue
  • Dark
  • Nearest: Dark slate grey

#1B2F4A is a blue with RGB values 27, 47, 74 and HSL 214°, 47%, 20%. It is a dark colour, so white text on it reaches 13.5:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#1B2F4A#1B2F4A
HEX#1B2F4A
RGBrgb(27, 47, 74)
RGB (0–1)0.1059, 0.1843, 0.2902
RGB percentages10.6%, 18.4%, 29%
HSLhsl(214.5, 46.5%, 19.8%)
HSV / HSBhsv(214.5, 63.5%, 29%)
CMYK63.5%, 36.5%, 0%, 71%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,781,578
CSS custom property--colour: #1B2F4A;

Brightness & contrast

Relative luminance0.0276WCAG 2.x, 0 is black and 1 is white
Perceived brightness46.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 13.53:1
Contrast with white13.53:1WCAG normal text: AAA
Contrast with black1.55:1WCAG normal text: Fail
Greyscale equivalent#2D2D2D
Inverted#E4D0B5

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#24314Bno red cones; affects about 1% of men; ΔE 2.4 from the original
Deuteranopia#1E2C49no green cones; the most common form, about 1% of men; ΔE 2.8 from the original
Tritanopia#003539no blue cones; rare, and affects men and women equally; ΔE 19.9 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text13.53:1WCAG large text: AAA
Contrast with black, large text1.55:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 23.7Black · ΔE 27.1Dim grey · ΔE 31.8Slate grey · ΔE 35Dark slateblue · ΔE 35.6Steel blue · ΔE 36.3
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 23.73, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#4A361B
Analogous#1B464A, #1F1B4A
Triadic#4A1B2F, #2F4A1B
Split complementary#4A1F1B, #464A1B
Tetradic#4A1B46, #4A361B, #1B4A1F

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#6991C8
Lighter +30%#4476BA
Lighter +20%#365E95
Lighter +10%#29476F
Darker −10%#0D1725
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#0E2D57
Less saturated −25%#28313D

Channel breakdown

R27
G47
B74
Red27 (10.6%)
Green47 (18.4%)
Blue74 (29%)
Hue214.47°
Saturation (HSL)46.53%
Lightness19.8%
Dominant channelBlue
Hex per channelR 1B · G 2F · B 4A

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Every value on this page was computed from “1b2f4a” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.