#1B2471#1B2471

#1B2471 is a dark, vivid blue. Relative luminance 0.027; OKLCH L 31.0% C 0.131 H 271.1°. Best body text is #FFFFFF at 13.66:1 contrast (WCAG AA passes).

Color values

HEX	#1B2471
RGB	rgb(27, 36, 113)
HSL	hsl(234, 61%, 27%)
HSV	hsv(234, 76%, 44%)
CMYK	cmyk(76.1%, 68.1%, 0%, 55.7%)
CIE-LAB	lab(18.74, 25.07, -45.47)
CIE-LCH	lch(18.74, 51.92, 298.87°)
OKLab	oklab(30.96% 0.0025 -0.1314)
OKLCH	oklch(30.96% 0.131 271.1)
XYZ	xyz(4.0625, 2.6866, 15.9240)
Luminance	0.0269 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2471 #71681B

analogous

#1B4F71 #1B2471 #3D1B71

triadic

#1B2471 #711B24 #24711B

tetradic

#1B2471 #711B4F #71681B #1B713D

square

#1B2471 #711B4F #71681B #1B713D

split-complementary

#1B2471 #713D1B #4F711B

monochromatic

#060819 #0F1440 #1B2471 #2734A2 #3747CF

Accessibility & contrast

On white

13.66

#1B2471 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.54

#1B2471 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2471

13.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2471	#FFFFFF	#000000	##FFFFFF
##1B2471	1.00	13.66	1.54	13.66
#FFFFFF	13.66	1.00	21.00	1.00
#000000	1.54	21.00	1.00	21.00
##FFFFFF	13.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003273

Deuteranopia (green-blind)

#002A70

Tritanopia (blue-blind)

#003847

Achromatopsia (no color)

#2E2E2E

Design tokens & code

CSS

--color: #1b2471;
/* rgb */ color: rgb(27, 36, 113);
/* oklch */ color: oklch(31.0% 0.131 271.1);

Tailwind

colors: {
  custom: {
    50: '#665e9b',
    500: '#1b2471',
    950: '#000000',
  },
}

SCSS

$custom: #1b2471;
$custom-light: #665e9b;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2471",
  "rgb": {
    "r": 27,
    "g": 36,
    "b": 113
  },
  "hsl": {
    "h": 233.721,
    "s": 61.429,
    "l": 27.451
  },
  "oklch": {
    "l": 0.30957,
    "c": 0.13146,
    "h": 271.1
  },
  "luminance": 0.02687
}

Semantic roles & 50–950 ramp

primary

#1B2471

secondary

#A69B42

accent

#D443E5

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#07040E

muted

#7A797E

Preview Lab

Preview with #1B2471

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

Preview Lab → · Contrast checker → · Palette generator →