#1B278A#1B278A

#1B278A is a dark, vivid blue. Relative luminance 0.035; OKLCH L 34.1% C 0.162 H 269.4°. Best body text is #FFFFFF at 12.33:1 contrast (WCAG AA passes).

Color values

HEX	#1B278A
RGB	rgb(27, 39, 138)
HSL	hsl(234, 67%, 32%)
HSV	hsv(234, 80%, 54%)
CMYK	cmyk(80.4%, 71.7%, 0%, 45.9%)
CIE-LAB	lab(22.01, 32.59, -55.97)
CIE-LCH	lch(22.01, 64.77, 300.21°)
OKLab	oklab(34.1% -0.0016 -0.1621)
OKLCH	oklch(34.1% 0.162 269.4)
XYZ	xyz(5.7634, 3.5184, 24.4152)
Luminance	0.0352 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B278A #8A7E1B

analogous

#1B5E8A #1B278A #471B8A

triadic

#1B278A #8A1B27 #278A1B

tetradic

#1B278A #8A1B5E #8A7E1B #1B8A47

square

#1B278A #8A1B5E #8A7E1B #1B8A47

split-complementary

#1B278A #8A471B #5E8A1B

monochromatic

#070A24 #111957 #1B278A #2535BD #4555DB

Accessibility & contrast

On white

12.33

#1B278A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.70

#1B278A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B278A

12.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B278A	#FFFFFF	#000000	##FFFFFF
##1B278A	1.00	12.33	1.70	12.33
#FFFFFF	12.33	1.00	21.00	1.00
#000000	1.70	21.00	1.00	21.00
##FFFFFF	12.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003A8D

Deuteranopia (green-blind)

#002F88

Tritanopia (blue-blind)

#004355

Achromatopsia (no color)

#353535

Design tokens & code

CSS

--color: #1b278a;
/* rgb */ color: rgb(27, 39, 138);
/* oklch */ color: oklch(34.1% 0.162 269.4);

Tailwind

colors: {
  custom: {
    50: '#6c61ad',
    500: '#1b278a',
    950: '#000000',
  },
}

SCSS

$custom: #1b278a;
$custom-light: #6c61ad;
$custom-dark: #000000;

JSON

{
  "hex": "#1b278a",
  "rgb": {
    "r": 27,
    "g": 39,
    "b": 138
  },
  "hsl": {
    "h": 233.514,
    "s": 67.273,
    "l": 32.353
  },
  "oklch": {
    "l": 0.34098,
    "c": 0.1621,
    "h": 269.4
  },
  "luminance": 0.03519
}

Semantic roles & 50–950 ramp

primary

#1B278A

secondary

#BCAF45

accent

#D83EEA

background

#F7F5FA

surface

#EDEAF4

border

#C8C6CE

text

#080510

muted

#7B797F

Preview Lab

Preview with #1B278A

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

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