#1B2473#1B2473

#1B2473 is a dark, vivid blue. Relative luminance 0.027; OKLCH L 31.2% C 0.134 H 271.0°. Best body text is #FFFFFF at 13.58:1 contrast (WCAG AA passes).

Color values

HEX	#1B2473
RGB	rgb(27, 36, 115)
HSL	hsl(234, 62%, 28%)
HSV	hsv(234, 77%, 45%)
CMYK	cmyk(76.5%, 68.7%, 0%, 54.9%)
CIE-LAB	lab(18.94, 25.84, -46.44)
CIE-LCH	lch(18.94, 53.15, 299.10°)
OKLab	oklab(31.16% 0.0024 -0.1343)
OKLCH	oklch(31.16% 0.134 271)
XYZ	xyz(4.1763, 2.7321, 16.5236)
Luminance	0.0273 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2473 #736A1B

analogous

#1B5073 #1B2473 #3E1B73

triadic

#1B2473 #731B24 #24731B

tetradic

#1B2473 #731B50 #736A1B #1B733E

square

#1B2473 #731B50 #736A1B #1B733E

split-complementary

#1B2473 #733E1B #50731B

monochromatic

#060819 #0F1441 #1B2473 #2734A5 #3848D0

Accessibility & contrast

On white

13.58

#1B2473 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.55

#1B2473 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2473

13.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2473	#FFFFFF	#000000	##FFFFFF
##1B2473	1.00	13.58	1.55	13.58
#FFFFFF	13.58	1.00	21.00	1.00
#000000	1.55	21.00	1.00	21.00
##FFFFFF	13.58	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003275

Deuteranopia (green-blind)

#002A72

Tritanopia (blue-blind)

#003948

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #1b2473;
/* rgb */ color: rgb(27, 36, 115);
/* oklch */ color: oklch(31.2% 0.134 271.0);

Tailwind

colors: {
  custom: {
    50: '#665e9c',
    500: '#1b2473',
    950: '#000000',
  },
}

SCSS

$custom: #1b2473;
$custom-light: #665e9c;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2473",
  "rgb": {
    "r": 27,
    "g": 36,
    "b": 115
  },
  "hsl": {
    "h": 233.864,
    "s": 61.972,
    "l": 27.843
  },
  "oklch": {
    "l": 0.3116,
    "c": 0.13429,
    "h": 271
  },
  "luminance": 0.02733
}

Semantic roles & 50–950 ramp

primary

#1B2473

secondary

#A89D42

accent

#D443E5

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#07040E

muted

#7A797E

Preview Lab

Preview with #1B2473

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

Preview Lab → · Contrast checker → · Palette generator →