#1B2FA0#1B2FA0

#1B2FA0 is a dark, vivid blue. Relative luminance 0.048; OKLCH L 37.8% C 0.182 H 267.7°. Best body text is #FFFFFF at 10.71:1 contrast (WCAG AA passes).

Color values

HEX	#1B2FA0
RGB	rgb(27, 47, 160)
HSL	hsl(231, 71%, 37%)
HSV	hsv(231, 83%, 63%)
CMYK	cmyk(83.1%, 70.6%, 0%, 37.3%)
CIE-LAB	lab(26.17, 35.64, -62.67)
CIE-LCH	lch(26.17, 72.10, 299.62°)
OKLab	oklab(37.79% -0.0073 -0.1816)
OKLCH	oklch(37.79% 0.182 267.7)
XYZ	xyz(7.8115, 4.8032, 33.7663)
Luminance	0.0480 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2FA0 #A08C1B

analogous

#1B72A0 #1B2FA0 #491BA0

triadic

#1B2FA0 #A01B2F #2FA01B

tetradic

#1B2FA0 #A01B72 #A08C1B #1BA049

square

#1B2FA0 #A01B72 #A08C1B #1BA049

split-complementary

#1B2FA0 #A0491B #72A01B

monochromatic

#091037 #12206C #1B2FA0 #243ED4 #5369E2

Accessibility & contrast

On white

10.71

#1B2FA0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.96

#1B2FA0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2FA0

10.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2FA0	#FFFFFF	#000000	##FFFFFF
##1B2FA0	1.00	10.71	1.96	10.71
#FFFFFF	10.71	1.00	21.00	1.00
#000000	1.96	21.00	1.00	21.00
##FFFFFF	10.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0044A3

Deuteranopia (green-blind)

#00379E

Tritanopia (blue-blind)

#004F64

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #1b2fa0;
/* rgb */ color: rgb(27, 47, 160);
/* oklch */ color: oklch(37.8% 0.182 267.7);

Tailwind

colors: {
  custom: {
    50: '#7168bd',
    500: '#1b2fa0',
    950: '#000000',
  },
}

SCSS

$custom: #1b2fa0;
$custom-light: #7168bd;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2fa0",
  "rgb": {
    "r": 27,
    "g": 47,
    "b": 160
  },
  "hsl": {
    "h": 230.977,
    "s": 71.123,
    "l": 36.667
  },
  "oklch": {
    "l": 0.37786,
    "c": 0.18177,
    "h": 267.7
  },
  "luminance": 0.04804
}

Semantic roles & 50–950 ramp

primary

#1B2FA0

secondary

#C5B452

accent

#D33AEE

background

#F7F6FB

surface

#EEEBF7

border

#C9C6D0

text

#090612

muted

#7B7A81

Preview Lab

Preview with #1B2FA0

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

Preview Lab → · Contrast checker → · Palette generator →