#1B278E#1B278E

#1B278E is a dark, vivid blue. Relative luminance 0.036; OKLCH L 34.5% C 0.167 H 269.3°. Best body text is #FFFFFF at 12.16:1 contrast (WCAG AA passes).

Color values

HEX	#1B278E
RGB	rgb(27, 39, 142)
HSL	hsl(234, 68%, 33%)
HSV	hsv(234, 81%, 56%)
CMYK	cmyk(81%, 72.5%, 0%, 44.3%)
CIE-LAB	lab(22.43, 34.08, -57.77)
CIE-LCH	lch(22.43, 67.07, 300.54°)
OKLab	oklab(34.53% -0.0021 -0.1673)
OKLCH	oklch(34.53% 0.167 269.3)
XYZ	xyz(6.0583, 3.6364, 25.9685)
Luminance	0.0364 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B278E #8E821B

analogous

#1B608E #1B278E #481B8E

triadic

#1B278E #8E1B27 #278E1B

tetradic

#1B278E #8E1B60 #8E821B #1B8E48

square

#1B278E #8E1B60 #8E821B #1B8E48

split-complementary

#1B278E #8E481B #608E1B

monochromatic

#070B27 #11195B #1B278E #2535C1 #4757DC

Accessibility & contrast

On white

12.16

#1B278E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.73

#1B278E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B278E

12.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B278E	#FFFFFF	#000000	##FFFFFF
##1B278E	1.00	12.16	1.73	12.16
#FFFFFF	12.16	1.00	21.00	1.00
#000000	1.73	21.00	1.00	21.00
##FFFFFF	12.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003B91

Deuteranopia (green-blind)

#00308C

Tritanopia (blue-blind)

#004457

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #1b278e;
/* rgb */ color: rgb(27, 39, 142);
/* oklch */ color: oklch(34.5% 0.167 269.3);

Tailwind

colors: {
  custom: {
    50: '#6d61b0',
    500: '#1b278e',
    950: '#000000',
  },
}

SCSS

$custom: #1b278e;
$custom-light: #6d61b0;
$custom-dark: #000000;

JSON

{
  "hex": "#1b278e",
  "rgb": {
    "r": 27,
    "g": 39,
    "b": 142
  },
  "hsl": {
    "h": 233.739,
    "s": 68.047,
    "l": 33.137
  },
  "oklch": {
    "l": 0.34527,
    "c": 0.16734,
    "h": 269.3
  },
  "luminance": 0.03637
}

Semantic roles & 50–950 ramp

primary

#1B278E

secondary

#BEB147

accent

#D93DEB

background

#F7F5FB

surface

#EDEAF6

border

#C8C6D0

text

#080511

muted

#7B7980

Preview Lab

Preview with #1B278E

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

Preview Lab → · Contrast checker → · Palette generator →