#1F2F81#1F2F81

#1F2F81 is a dark, vivid blue. Relative luminance 0.039; OKLCH L 34.9% C 0.139 H 269.3°. Best body text is #FFFFFF at 11.79:1 contrast (WCAG AA passes).

Color values

HEX	#1F2F81
RGB	rgb(31, 47, 129)
HSL	hsl(230, 61%, 31%)
HSV	hsv(230, 76%, 51%)
CMYK	cmyk(76%, 63.6%, 0%, 49.4%)
CIE-LAB	lab(23.37, 24.21, -48.09)
CIE-LCH	lch(23.37, 53.84, 296.72°)
OKLab	oklab(34.88% -0.0018 -0.1389)
OKLCH	oklch(34.88% 0.139 269.3)
XYZ	xyz(5.5427, 3.9087, 21.2270)
Luminance	0.0391 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F2F81 #81711F

analogous

#1F6081 #1F2F81 #401F81

triadic

#1F2F81 #811F2F #2F811F

tetradic

#1F2F81 #811F60 #81711F #1F8140

square

#1F2F81 #811F60 #81711F #1F8140

split-complementary

#1F2F81 #81401F #60811F

monochromatic

#070B1E #131D50 #1F2F81 #2B41B2 #475ED3

Accessibility & contrast

On white

11.79

#1F2F81 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.78

#1F2F81 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F2F81

11.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F2F81	#FFFFFF	#000000	##FFFFFF
##1F2F81	1.00	11.79	1.78	11.79
#FFFFFF	11.79	1.00	21.00	1.00
#000000	1.78	21.00	1.00	21.00
##FFFFFF	11.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003C84

Deuteranopia (green-blind)

#00337F

Tritanopia (blue-blind)

#004453

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #1f2f81;
/* rgb */ color: rgb(31, 47, 129);
/* oklch */ color: oklch(34.9% 0.139 269.3);

Tailwind

colors: {
  custom: {
    50: '#6a67a6',
    500: '#1f2f81',
    950: '#000000',
  },
}

SCSS

$custom: #1f2f81;
$custom-light: #6a67a6;
$custom-dark: #000000;

JSON

{
  "hex": "#1f2f81",
  "rgb": {
    "r": 31,
    "g": 47,
    "b": 129
  },
  "hsl": {
    "h": 230.204,
    "s": 61.25,
    "l": 31.373
  },
  "oklch": {
    "l": 0.3488,
    "c": 0.13893,
    "h": 269.3
  },
  "luminance": 0.03909
}

Semantic roles & 50–950 ramp

primary

#1F2F81

secondary

#B4A248

accent

#CA43E4

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#07060F

muted

#7A7A7F

Preview Lab

Preview with #1F2F81

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

Preview Lab → · Contrast checker → · Palette generator →