#1F2C81#1F2C81

#1F2C81 is a dark, vivid blue. Relative luminance 0.037; OKLCH L 34.3% C 0.143 H 270.1°. Best body text is #FFFFFF at 12.10:1 contrast (WCAG AA passes).

Color values

HEX	#1F2C81
RGB	rgb(31, 44, 129)
HSL	hsl(232, 61%, 31%)
HSV	hsv(232, 76%, 51%)
CMYK	cmyk(76%, 65.9%, 0%, 49.4%)
CIE-LAB	lab(22.57, 26.27, -49.39)
CIE-LCH	lch(22.57, 55.94, 298.00°)
OKLab	oklab(34.29% 0.0003 -0.1428)
OKLCH	oklch(34.29% 0.143 270.1)
XYZ	xyz(5.4268, 3.6771, 21.1884)
Luminance	0.0368 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F2C81 #81741F

analogous

#1F5D81 #1F2C81 #431F81

triadic

#1F2C81 #811F2C #2C811F

tetradic

#1F2C81 #811F5D #81741F #1F8143

square

#1F2C81 #811F5D #81741F #1F8143

split-complementary

#1F2C81 #81431F #5D811F

monochromatic

#070A1E #131B50 #1F2C81 #2B3DB2 #475AD3

Accessibility & contrast

On white

12.10

#1F2C81 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.74

#1F2C81 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F2C81

12.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F2C81	#FFFFFF	#000000	##FFFFFF
##1F2C81	1.00	12.10	1.74	12.10
#FFFFFF	12.10	1.00	21.00	1.00
#000000	1.74	21.00	1.00	21.00
##FFFFFF	12.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003B84

Deuteranopia (green-blind)

#00317F

Tritanopia (blue-blind)

#004252

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #1f2c81;
/* rgb */ color: rgb(31, 44, 129);
/* oklch */ color: oklch(34.3% 0.143 270.1);

Tailwind

colors: {
  custom: {
    50: '#6b65a6',
    500: '#1f2c81',
    950: '#000000',
  },
}

SCSS

$custom: #1f2c81;
$custom-light: #6b65a6;
$custom-dark: #000000;

JSON

{
  "hex": "#1f2c81",
  "rgb": {
    "r": 31,
    "g": 44,
    "b": 129
  },
  "hsl": {
    "h": 232.041,
    "s": 61.25,
    "l": 31.373
  },
  "oklch": {
    "l": 0.34295,
    "c": 0.14276,
    "h": 270.1
  },
  "luminance": 0.03678
}

Semantic roles & 50–950 ramp

primary

#1F2C81

secondary

#B4A648

accent

#CF43E4

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#08050F

muted

#7A7A7F

Preview Lab

Preview with #1F2C81

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

Preview Lab → · Contrast checker → · Palette generator →