#1B2D78#1B2D78

#1B2D78 is a dark, vivid blue. Relative luminance 0.035; OKLCH L 33.4% C 0.130 H 268.1°. Best body text is #FFFFFF at 12.40:1 contrast (WCAG AA passes).

Color values

HEX	#1B2D78
RGB	rgb(27, 45, 120)
HSL	hsl(228, 63%, 29%)
HSV	hsv(228, 78%, 47%)
CMYK	cmyk(77.5%, 62.5%, 0%, 52.9%)
CIE-LAB	lab(21.82, 21.54, -44.93)
CIE-LCH	lch(21.82, 49.83, 295.61°)
OKLab	oklab(33.43% -0.0043 -0.1298)
OKLCH	oklch(33.43% 0.13 268.1)
XYZ	xyz(4.7794, 3.4653, 18.1826)
Luminance	0.0347 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2D78 #78661B

analogous

#1B5C78 #1B2D78 #381B78

triadic

#1B2D78 #781B2D #2D781B

tetradic

#1B2D78 #781B5C #78661B #1B7838

square

#1B2D78 #781B5C #78661B #1B7838

split-complementary

#1B2D78 #78381B #5C781B

monochromatic

#060919 #101A46 #1B2D78 #2640AA #3B58D3

Accessibility & contrast

On white

12.40

#1B2D78 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.69

#1B2D78 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2D78

12.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2D78	#FFFFFF	#000000	##FFFFFF
##1B2D78	1.00	12.40	1.69	12.40
#FFFFFF	12.40	1.00	21.00	1.00
#000000	1.69	21.00	1.00	21.00
##FFFFFF	12.40	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00397A

Deuteranopia (green-blind)

#003077

Tritanopia (blue-blind)

#00404E

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #1b2d78;
/* rgb */ color: rgb(27, 45, 120);
/* oklch */ color: oklch(33.4% 0.130 268.1);

Tailwind

colors: {
  custom: {
    50: '#6765a0',
    500: '#1b2d78',
    950: '#000000',
  },
}

SCSS

$custom: #1b2d78;
$custom-light: #6765a0;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2d78",
  "rgb": {
    "r": 27,
    "g": 45,
    "b": 120
  },
  "hsl": {
    "h": 228.387,
    "s": 63.265,
    "l": 28.824
  },
  "oklch": {
    "l": 0.33427,
    "c": 0.12983,
    "h": 268.1
  },
  "luminance": 0.03466
}

Semantic roles & 50–950 ramp

primary

#1B2D78

secondary

#AC9843

accent

#C641E6

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#07050F

muted

#7A7A7E

Preview Lab

Preview with #1B2D78

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

Preview Lab → · Contrast checker → · Palette generator →