#1B1D74#1B1D74

#1B1D74 is a dark, vivid blue. Relative luminance 0.024; OKLCH L 30.0% C 0.144 H 272.6°. Best body text is #FFFFFF at 14.24:1 contrast (WCAG AA passes).

Color values

HEX	#1B1D74
RGB	rgb(27, 29, 116)
HSL	hsl(239, 62%, 28%)
HSV	hsv(239, 77%, 45%)
CMYK	cmyk(76.7%, 75%, 0%, 54.5%)
CIE-LAB	lab(17.33, 30.87, -49.73)
CIE-LCH	lch(17.33, 58.53, 301.83°)
OKLab	oklab(30.03% 0.0066 -0.1439)
OKLCH	oklch(30.03% 0.144 272.6)
XYZ	xyz(4.0427, 2.3723, 16.7644)
Luminance	0.0237 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B1D74 #74721B

analogous

#1B4974 #1B1D74 #451B74

triadic

#1B1D74 #741B1D #1D741B

tetradic

#1B1D74 #741B49 #74721B #1B7445

square

#1B1D74 #741B49 #74721B #1B7445

split-complementary

#1B1D74 #74451B #49741B

monochromatic

#060619 #0F1142 #1B1D74 #2729A6 #393CD1

Accessibility & contrast

On white

14.24

#1B1D74 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.47

#1B1D74 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B1D74

14.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B1D74	#FFFFFF	#000000	##FFFFFF
##1B1D74	1.00	14.24	1.47	14.24
#FFFFFF	14.24	1.00	21.00	1.00
#000000	1.47	21.00	1.00	21.00
##FFFFFF	14.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002F77

Deuteranopia (green-blind)

#002672

Tritanopia (blue-blind)

#003646

Achromatopsia (no color)

#2B2B2B

Design tokens & code

CSS

--color: #1b1d74;
/* rgb */ color: rgb(27, 29, 116);
/* oklch */ color: oklch(30.0% 0.144 272.6);

Tailwind

colors: {
  custom: {
    50: '#675a9d',
    500: '#1b1d74',
    950: '#000000',
  },
}

SCSS

$custom: #1b1d74;
$custom-light: #675a9d;
$custom-dark: #000000;

JSON

{
  "hex": "#1b1d74",
  "rgb": {
    "r": 27,
    "g": 29,
    "b": 116
  },
  "hsl": {
    "h": 238.652,
    "s": 62.238,
    "l": 28.039
  },
  "oklch": {
    "l": 0.3003,
    "c": 0.14403,
    "h": 272.6
  },
  "luminance": 0.02373
}

Semantic roles & 50–950 ramp

primary

#1B1D74

secondary

#A9A642

accent

#E242E5

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#07040E

muted

#7A797E

Preview Lab

Preview with #1B1D74

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

Preview Lab → · Contrast checker → · Palette generator →