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Recognised as Colour

#1B1530

  • #1B1530
  • Blue
  • Dark
  • Nearest: Black

#1B1530 is a blue with RGB values 27, 21, 48 and HSL 253°, 39%, 14%. It is a dark colour, so white text on it reaches 17.6:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#1B1530#1B1530
HEX#1B1530
RGBrgb(27, 21, 48)
RGB (0–1)0.1059, 0.0824, 0.1882
RGB percentages10.6%, 8.2%, 18.8%
HSLhsl(253.3, 39.1%, 13.5%)
HSV / HSBhsv(253.3, 56.3%, 18.8%)
CMYK43.8%, 56.2%, 0%, 81.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,774,896
CSS custom property--colour: #1B1530;

Brightness & contrast

Relative luminance0.00983WCAG 2.x, 0 is black and 1 is white
Perceived brightness27.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 17.55:1
Contrast with white17.55:1WCAG normal text: AAA
Contrast with black1.2:1WCAG normal text: Fail
Greyscale equivalent#181818
Inverted#E4EACF

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0B1A31no red cones; affects about 1% of men; ΔE 8.1 from the original
Deuteranopia#0C192Fno green cones; the most common form, about 1% of men; ΔE 8 from the original
Tritanopia#161A20no blue cones; rare, and affects men and women equally; ΔE 16.5 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text17.55:1WCAG large text: AAA
Contrast with black, large text1.2:1WCAG large text: Fail

Named colours

Black · ΔE 22.1Dark slate grey · ΔE 34.6Dark slateblue · ΔE 36.6Midnight blue · ΔE 39.2Dim grey · ΔE 40.9Slate grey · ΔE 46.4
Nearest named CSS colourBlack (#000000)ΔE 22.13, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#2A3015
Analogous#151C30, #291530
Triadic#301B15, #15301B
Split complementary#302915, #1C3015
Tetradic#30151C, #2A3015, #153029

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#6F5AB7
Lighter +30%#57449A
Lighter +20%#433477
Lighter +10%#2F2553
Darker −10%#07050D
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#160C39
Less saturated −25%#201E27

Channel breakdown

R27
G21
B48
Red27 (10.6%)
Green21 (8.2%)
Blue48 (18.8%)
Hue253.33°
Saturation (HSL)39.13%
Lightness13.53%
Dominant channelBlue
Hex per channelR 1B · G 15 · B 30

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Every value on this page was computed from “1b1530” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.