#1F3281#1F3281

#1F3281 is a dark, vivid blue. Relative luminance 0.042; OKLCH L 35.5% C 0.135 H 268.3°. Best body text is #FFFFFF at 11.47:1 contrast (WCAG AA passes).

Color values

HEX	#1F3281
RGB	rgb(31, 50, 129)
HSL	hsl(228, 61%, 31%)
HSV	hsv(228, 76%, 51%)
CMYK	cmyk(76%, 61.2%, 0%, 49.4%)
CIE-LAB	lab(24.18, 22.13, -46.76)
CIE-LCH	lch(24.18, 51.73, 295.32°)
OKLab	oklab(35.49% -0.0041 -0.135)
OKLCH	oklch(35.49% 0.135 268.3)
XYZ	xyz(5.6668, 4.1569, 21.2683)
Luminance	0.0416 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3281 #816E1F

analogous

#1F6381 #1F3281 #3D1F81

triadic

#1F3281 #811F32 #32811F

tetradic

#1F3281 #811F63 #816E1F #1F813D

square

#1F3281 #811F63 #816E1F #1F813D

split-complementary

#1F3281 #813D1F #63811F

monochromatic

#070C1E #131F50 #1F3281 #2B45B2 #4763D3

Accessibility & contrast

On white

11.47

#1F3281 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.83

#1F3281 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3281

11.47:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3281	#FFFFFF	#000000	##FFFFFF
##1F3281	1.00	11.47	1.83	11.47
#FFFFFF	11.47	1.00	21.00	1.00
#000000	1.83	21.00	1.00	21.00
##FFFFFF	11.47	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003E84

Deuteranopia (green-blind)

#00357F

Tritanopia (blue-blind)

#004654

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #1f3281;
/* rgb */ color: rgb(31, 50, 129);
/* oklch */ color: oklch(35.5% 0.135 268.3);

Tailwind

colors: {
  custom: {
    50: '#6a69a6',
    500: '#1f3281',
    950: '#000000',
  },
}

SCSS

$custom: #1f3281;
$custom-light: #6a69a6;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3281",
  "rgb": {
    "r": 31,
    "g": 50,
    "b": 129
  },
  "hsl": {
    "h": 228.367,
    "s": 61.25,
    "l": 31.373
  },
  "oklch": {
    "l": 0.35486,
    "c": 0.13504,
    "h": 268.3
  },
  "luminance": 0.04157
}

Semantic roles & 50–950 ramp

primary

#1F3281

secondary

#B49F48

accent

#C543E4

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#07060F

muted

#7A7A7F

Preview Lab

Preview with #1F3281

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

Preview Lab → · Contrast checker → · Palette generator →