#1F2D81#1F2D81

#1F2D81 is a dark, vivid blue. Relative luminance 0.038; OKLCH L 34.5% C 0.141 H 269.9°. Best body text is #FFFFFF at 12.00:1 contrast (WCAG AA passes).

Color values

HEX	#1F2D81
RGB	rgb(31, 45, 129)
HSL	hsl(231, 61%, 31%)
HSV	hsv(231, 76%, 51%)
CMYK	cmyk(76%, 65.1%, 0%, 49.4%)
CIE-LAB	lab(22.84, 25.58, -48.96)
CIE-LCH	lch(22.84, 55.24, 297.59°)
OKLab	oklab(34.49% -0.0004 -0.1415)
OKLCH	oklch(34.49% 0.141 269.9)
XYZ	xyz(5.4646, 3.7525, 21.2009)
Luminance	0.0375 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F2D81 #81731F

analogous

#1F5E81 #1F2D81 #421F81

triadic

#1F2D81 #811F2D #2D811F

tetradic

#1F2D81 #811F5E #81731F #1F8142

square

#1F2D81 #811F5E #81731F #1F8142

split-complementary

#1F2D81 #81421F #5E811F

monochromatic

#070B1E #131C50 #1F2D81 #2B3EB2 #475BD3

Accessibility & contrast

On white

12.00

#1F2D81 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.75

#1F2D81 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F2D81

12.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F2D81	#FFFFFF	#000000	##FFFFFF
##1F2D81	1.00	12.00	1.75	12.00
#FFFFFF	12.00	1.00	21.00	1.00
#000000	1.75	21.00	1.00	21.00
##FFFFFF	12.00	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003B84

Deuteranopia (green-blind)

#00327F

Tritanopia (blue-blind)

#004352

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #1f2d81;
/* rgb */ color: rgb(31, 45, 129);
/* oklch */ color: oklch(34.5% 0.141 269.9);

Tailwind

colors: {
  custom: {
    50: '#6b65a6',
    500: '#1f2d81',
    950: '#000000',
  },
}

SCSS

$custom: #1f2d81;
$custom-light: #6b65a6;
$custom-dark: #000000;

JSON

{
  "hex": "#1f2d81",
  "rgb": {
    "r": 31,
    "g": 45,
    "b": 129
  },
  "hsl": {
    "h": 231.429,
    "s": 61.25,
    "l": 31.373
  },
  "oklch": {
    "l": 0.34487,
    "c": 0.14149,
    "h": 269.9
  },
  "luminance": 0.03753
}

Semantic roles & 50–950 ramp

primary

#1F2D81

secondary

#B4A448

accent

#CD43E4

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#08050F

muted

#7A7A7F

Preview Lab

Preview with #1F2D81

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

Preview Lab → · Contrast checker → · Palette generator →