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Recognised as Colour

#1B2A67

  • #1B2A67
  • Blue
  • Dark
  • Nearest: Dark slateblue

#1B2A67 is a blue with RGB values 27, 42, 103 and HSL 228°, 58%, 25%. It is a dark colour, so white text on it reaches 13.3:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#1B2A67#1B2A67
HEX#1B2A67
RGBrgb(27, 42, 103)
RGB (0–1)0.1059, 0.1647, 0.4039
RGB percentages10.6%, 16.5%, 40.4%
HSLhsl(228.2, 58.5%, 25.5%)
HSV / HSBhsv(228.2, 73.8%, 40.4%)
CMYK73.8%, 59.2%, 0%, 59.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,780,327
CSS custom property--colour: #1B2A67;

Brightness & contrast

Relative luminance0.02868WCAG 2.x, 0 is black and 1 is white
Perceived brightness49.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 13.34:1
Contrast with white13.34:1WCAG normal text: AAA
Contrast with black1.57:1WCAG normal text: Fail
Greyscale equivalent#2B2B2B
Inverted#E4D598

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#003369no red cones; affects about 1% of men; ΔE 9.1 from the original
Deuteranopia#002C66no green cones; the most common form, about 1% of men; ΔE 4.9 from the original
Tritanopia#003944no blue cones; rare, and affects men and women equally; ΔE 39.1 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text13.34:1WCAG large text: AAA
Contrast with black, large text1.57:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 15.2Midnight blue · ΔE 19.4Rebecca purple · ΔE 30.8Slate blue · ΔE 37.9Indigo · ΔE 38.2Steel blue · ΔE 39.4
Nearest named CSS colourDark slateblue (#483D8B)ΔE 15.24, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#67581B
Analogous#1B5067, #321B67
Triadic#671B2A, #2A671B
Split complementary#67321B, #50671B
Tetradic#671B50, #67581B, #1B6732

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#7488DA
Lighter +30%#4B65D0
Lighter +20%#304BB8
Lighter +10%#263A8F
Darker −10%#101A3F
Darker −20%#060916
Darker −30%#000000
Darker −40%#000000
More saturated +25%#0B2077
Less saturated −25%#2B3457

Channel breakdown

R27
G42
B103
Red27 (10.6%)
Green42 (16.5%)
Blue103 (40.4%)
Hue228.16°
Saturation (HSL)58.46%
Lightness25.49%
Dominant channelBlue
Hex per channelR 1B · G 2A · B 67

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Every value on this page was computed from “1b2a67” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.