#1B2FA1#1B2FA1

#1B2FA1 is a dark, vivid blue. Relative luminance 0.048; OKLCH L 37.9% C 0.183 H 267.7°. Best body text is #FFFFFF at 10.67:1 contrast (WCAG AA passes).

Color values

HEX	#1B2FA1
RGB	rgb(27, 47, 161)
HSL	hsl(231, 71%, 37%)
HSV	hsv(231, 83%, 63%)
CMYK	cmyk(83.2%, 70.8%, 0%, 36.9%)
CIE-LAB	lab(26.27, 36.01, -63.11)
CIE-LCH	lch(26.27, 72.66, 299.70°)
OKLab	oklab(37.89% -0.0074 -0.1829)
OKLCH	oklch(37.89% 0.183 267.7)
XYZ	xyz(7.8993, 4.8383, 34.2289)
Luminance	0.0484 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B2FA1 #A18D1B

analogous

#1B72A1 #1B2FA1 #4A1BA1

triadic

#1B2FA1 #A11B2F #2FA11B

tetradic

#1B2FA1 #A11B72 #A18D1B #1BA14A

square

#1B2FA1 #A11B72 #A18D1B #1BA14A

split-complementary

#1B2FA1 #A14A1B #72A11B

monochromatic

#091038 #12206D #1B2FA1 #243ED5 #5469E2

Accessibility & contrast

On white

10.67

#1B2FA1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.97

#1B2FA1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B2FA1

10.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B2FA1	#FFFFFF	#000000	##FFFFFF
##1B2FA1	1.00	10.67	1.97	10.67
#FFFFFF	10.67	1.00	21.00	1.00
#000000	1.97	21.00	1.00	21.00
##FFFFFF	10.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0045A4

Deuteranopia (green-blind)

#00389F

Tritanopia (blue-blind)

#004F64

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #1b2fa1;
/* rgb */ color: rgb(27, 47, 161);
/* oklch */ color: oklch(37.9% 0.183 267.7);

Tailwind

colors: {
  custom: {
    50: '#7268be',
    500: '#1b2fa1',
    950: '#000000',
  },
}

SCSS

$custom: #1b2fa1;
$custom-light: #7268be;
$custom-dark: #000000;

JSON

{
  "hex": "#1b2fa1",
  "rgb": {
    "r": 27,
    "g": 47,
    "b": 161
  },
  "hsl": {
    "h": 231.045,
    "s": 71.277,
    "l": 36.863
  },
  "oklch": {
    "l": 0.37891,
    "c": 0.18305,
    "h": 267.7
  },
  "luminance": 0.04839
}

Semantic roles & 50–950 ramp

primary

#1B2FA1

secondary

#C5B452

accent

#D33AEE

background

#F7F6FB

surface

#EEEBF7

border

#C9C6D0

text

#090612

muted

#7B7A81

Preview Lab

Preview with #1B2FA1

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

Preview Lab → · Contrast checker → · Palette generator →