#1B278C#1B278C

#1B278C is a dark, vivid blue. Relative luminance 0.036; OKLCH L 34.3% C 0.165 H 269.4°. Best body text is #FFFFFF at 12.24:1 contrast (WCAG AA passes).

Color values

HEX	#1B278C
RGB	rgb(27, 39, 140)
HSL	hsl(234, 68%, 33%)
HSV	hsv(234, 81%, 55%)
CMYK	cmyk(80.7%, 72.1%, 0%, 45.1%)
CIE-LAB	lab(22.22, 33.34, -56.87)
CIE-LCH	lch(22.22, 65.92, 300.38°)
OKLab	oklab(34.31% -0.0018 -0.1647)
OKLCH	oklch(34.31% 0.165 269.4)
XYZ	xyz(5.9095, 3.5768, 25.1848)
Luminance	0.0358 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B278C #8C801B

analogous

#1B608C #1B278C #471B8C

triadic

#1B278C #8C1B27 #278C1B

tetradic

#1B278C #8C1B60 #8C801B #1B8C47

square

#1B278C #8C1B60 #8C801B #1B8C47

split-complementary

#1B278C #8C471B #608C1B

monochromatic

#070A25 #111959 #1B278C #2535BF #4656DB

Accessibility & contrast

On white

12.24

#1B278C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.72

#1B278C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B278C

12.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B278C	#FFFFFF	#000000	##FFFFFF
##1B278C	1.00	12.24	1.72	12.24
#FFFFFF	12.24	1.00	21.00	1.00
#000000	1.72	21.00	1.00	21.00
##FFFFFF	12.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003B8F

Deuteranopia (green-blind)

#00308A

Tritanopia (blue-blind)

#004356

Achromatopsia (no color)

#353535

Design tokens & code

CSS

--color: #1b278c;
/* rgb */ color: rgb(27, 39, 140);
/* oklch */ color: oklch(34.3% 0.165 269.4);

Tailwind

colors: {
  custom: {
    50: '#6d61af',
    500: '#1b278c',
    950: '#000000',
  },
}

SCSS

$custom: #1b278c;
$custom-light: #6d61af;
$custom-dark: #000000;

JSON

{
  "hex": "#1b278c",
  "rgb": {
    "r": 27,
    "g": 39,
    "b": 140
  },
  "hsl": {
    "h": 233.628,
    "s": 67.665,
    "l": 32.745
  },
  "oklch": {
    "l": 0.34312,
    "c": 0.16473,
    "h": 269.4
  },
  "luminance": 0.03577
}

Semantic roles & 50–950 ramp

primary

#1B278C

secondary

#BDB046

accent

#D83DEB

background

#F7F5FA

surface

#EDEAF5

border

#C8C6CF

text

#080510

muted

#7B797F

Preview Lab

Preview with #1B278C

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

Preview Lab → · Contrast checker → · Palette generator →