#1B278D#1B278D

#1B278D is a dark, vivid blue. Relative luminance 0.036; OKLCH L 34.4% C 0.166 H 269.3°. Best body text is #FFFFFF at 12.20:1 contrast (WCAG AA passes).

Color values

HEX	#1B278D
RGB	rgb(27, 39, 141)
HSL	hsl(234, 68%, 33%)
HSV	hsv(234, 81%, 55%)
CMYK	cmyk(80.9%, 72.3%, 0%, 44.7%)
CIE-LAB	lab(22.33, 33.71, -57.32)
CIE-LCH	lch(22.33, 66.50, 300.46°)
OKLab	oklab(34.42% -0.0019 -0.166)
OKLCH	oklch(34.42% 0.166 269.3)
XYZ	xyz(5.9836, 3.6065, 25.5749)
Luminance	0.0361 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B278D #8D811B

analogous

#1B608D #1B278D #481B8D

triadic

#1B278D #8D1B27 #278D1B

tetradic

#1B278D #8D1B60 #8D811B #1B8D48

square

#1B278D #8D1B60 #8D811B #1B8D48

split-complementary

#1B278D #8D481B #608D1B

monochromatic

#070B26 #11195A #1B278D #2535C0 #4756DC

Accessibility & contrast

On white

12.20

#1B278D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.72

#1B278D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B278D

12.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B278D	#FFFFFF	#000000	##FFFFFF
##1B278D	1.00	12.20	1.72	12.20
#FFFFFF	12.20	1.00	21.00	1.00
#000000	1.72	21.00	1.00	21.00
##FFFFFF	12.20	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003B90

Deuteranopia (green-blind)

#00308B

Tritanopia (blue-blind)

#004457

Achromatopsia (no color)

#353535

Design tokens & code

CSS

--color: #1b278d;
/* rgb */ color: rgb(27, 39, 141);
/* oklch */ color: oklch(34.4% 0.166 269.3);

Tailwind

colors: {
  custom: {
    50: '#6d61af',
    500: '#1b278d',
    950: '#000000',
  },
}

SCSS

$custom: #1b278d;
$custom-light: #6d61af;
$custom-dark: #000000;

JSON

{
  "hex": "#1b278d",
  "rgb": {
    "r": 27,
    "g": 39,
    "b": 141
  },
  "hsl": {
    "h": 233.684,
    "s": 67.857,
    "l": 32.941
  },
  "oklch": {
    "l": 0.34419,
    "c": 0.16604,
    "h": 269.3
  },
  "luminance": 0.03607
}

Semantic roles & 50–950 ramp

primary

#1B278D

secondary

#BDB146

accent

#D83DEB

background

#F7F5FA

surface

#EDEAF5

border

#C8C6CF

text

#080511

muted

#7B7980

Preview Lab

Preview with #1B278D

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →