#1B278F#1B278F

#1B278F is a dark, vivid blue. Relative luminance 0.037; OKLCH L 34.6% C 0.169 H 269.3°. Best body text is #FFFFFF at 12.11:1 contrast (WCAG AA passes).

Color values

HEX	#1B278F
RGB	rgb(27, 39, 143)
HSL	hsl(234, 68%, 33%)
HSV	hsv(234, 81%, 56%)
CMYK	cmyk(81.1%, 72.7%, 0%, 43.9%)
CIE-LAB	lab(22.54, 34.45, -58.22)
CIE-LCH	lch(22.54, 67.64, 300.61°)
OKLab	oklab(34.64% -0.0022 -0.1686)
OKLCH	oklch(34.64% 0.169 269.3)
XYZ	xyz(6.1337, 3.6665, 26.3657)
Luminance	0.0367 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B278F #8F831B

analogous

#1B618F #1B278F #491B8F

triadic

#1B278F #8F1B27 #278F1B

tetradic

#1B278F #8F1B61 #8F831B #1B8F49

square

#1B278F #8F1B61 #8F831B #1B8F49

split-complementary

#1B278F #8F491B #618F1B

monochromatic

#080B28 #11195C #1B278F #2535C2 #4857DC

Accessibility & contrast

On white

12.11

#1B278F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.73

#1B278F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B278F

12.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B278F	#FFFFFF	#000000	##FFFFFF
##1B278F	1.00	12.11	1.73	12.11
#FFFFFF	12.11	1.00	21.00	1.00
#000000	1.73	21.00	1.00	21.00
##FFFFFF	12.11	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003C92

Deuteranopia (green-blind)

#00308D

Tritanopia (blue-blind)

#004458

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #1b278f;
/* rgb */ color: rgb(27, 39, 143);
/* oklch */ color: oklch(34.6% 0.169 269.3);

Tailwind

colors: {
  custom: {
    50: '#6e62b1',
    500: '#1b278f',
    950: '#000000',
  },
}

SCSS

$custom: #1b278f;
$custom-light: #6e62b1;
$custom-dark: #000000;

JSON

{
  "hex": "#1b278f",
  "rgb": {
    "r": 27,
    "g": 39,
    "b": 143
  },
  "hsl": {
    "h": 233.793,
    "s": 68.235,
    "l": 33.333
  },
  "oklch": {
    "l": 0.34635,
    "c": 0.16864,
    "h": 269.3
  },
  "luminance": 0.03667
}

Semantic roles & 50–950 ramp

primary

#1B278F

secondary

#BEB248

accent

#D93DEB

background

#F7F5FB

surface

#EDEAF6

border

#C8C6D0

text

#080511

muted

#7B7980

Preview Lab

Preview with #1B278F

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

Preview Lab → · Contrast checker → · Palette generator →