#1F3C8A#1F3C8A

#1F3C8A is a dark, vivid blue. Relative luminance 0.054; OKLCH L 38.4% C 0.135 H 265.1°. Best body text is #FFFFFF at 10.14:1 contrast (WCAG AA passes).

Color values

HEX	#1F3C8A
RGB	rgb(31, 60, 138)
HSL	hsl(224, 63%, 33%)
HSV	hsv(224, 78%, 54%)
CMYK	cmyk(77.5%, 56.5%, 0%, 45.9%)
CIE-LAB	lab(27.73, 18.74, -46.61)
CIE-LCH	lch(27.73, 50.24, 291.90°)
OKLab	oklab(38.38% -0.0115 -0.1344)
OKLCH	oklch(38.38% 0.135 265.1)
XYZ	xyz(6.7668, 5.3573, 24.7173)
Luminance	0.0536 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3C8A #8A6D1F

analogous

#1F718A #1F3C8A #371F8A

triadic

#1F3C8A #8A1F3C #3C8A1F

tetradic

#1F3C8A #8A1F71 #8A6D1F #1F8A37

square

#1F3C8A #8A1F71 #8A6D1F #1F8A37

split-complementary

#1F3C8A #8A371F #718A1F

monochromatic

#091126 #142658 #1F3C8A #2A52BC #4C72D7

Accessibility & contrast

On white

10.14

#1F3C8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.07

#1F3C8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3C8A

10.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3C8A	#FFFFFF	#000000	##FFFFFF
##1F3C8A	1.00	10.14	2.07	10.14
#FFFFFF	10.14	1.00	21.00	1.00
#000000	2.07	21.00	1.00	21.00
##FFFFFF	10.14	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00478D

Deuteranopia (green-blind)

#003D88

Tritanopia (blue-blind)

#004F5D

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #1f3c8a;
/* rgb */ color: rgb(31, 60, 138);
/* oklch */ color: oklch(38.4% 0.135 265.1);

Tailwind

colors: {
  custom: {
    50: '#6c71ad',
    500: '#1f3c8a',
    950: '#000000',
  },
}

SCSS

$custom: #1f3c8a;
$custom-light: #6c71ad;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3c8a",
  "rgb": {
    "r": 31,
    "g": 60,
    "b": 138
  },
  "hsl": {
    "h": 223.738,
    "s": 63.314,
    "l": 33.137
  },
  "oklch": {
    "l": 0.38377,
    "c": 0.13486,
    "h": 265.1
  },
  "luminance": 0.05358
}

Semantic roles & 50–950 ramp

primary

#1F3C8A

secondary

#BA9C4B

accent

#BA41E6

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#080710

muted

#7A7A7F

Preview Lab

Preview with #1F3C8A

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

Preview Lab → · Contrast checker → · Palette generator →