#1F3377#1F3377

#1F3377 is a dark, moderate blue. Relative luminance 0.040; OKLCH L 34.8% C 0.119 H 267.4°. Best body text is #FFFFFF at 11.68:1 contrast (WCAG AA passes).

Color values

HEX	#1F3377
RGB	rgb(31, 51, 119)
HSL	hsl(226, 59%, 29%)
HSV	hsv(226, 74%, 47%)
CMYK	cmyk(73.9%, 57.1%, 0%, 53.3%)
CIE-LAB	lab(23.64, 17.45, -41.32)
CIE-LCH	lch(23.64, 44.86, 292.89°)
OKLab	oklab(34.82% -0.0053 -0.119)
OKLCH	oklch(34.82% 0.119 267.4)
XYZ	xyz(5.0775, 3.9903, 17.9518)
Luminance	0.0399 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3377 #77631F

analogous

#1F5F77 #1F3377 #371F77

triadic

#1F3377 #771F33 #33771F

tetradic

#1F3377 #771F5F #77631F #1F7737

square

#1F3377 #771F5F #77631F #1F7737

split-complementary

#1F3377 #77371F #5F771F

monochromatic

#060A18 #121E46 #1F3377 #2C48A8 #4362CE

Accessibility & contrast

On white

11.68

#1F3377 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.80

#1F3377 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3377

11.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3377	#FFFFFF	#000000	##FFFFFF
##1F3377	1.00	11.68	1.80	11.68
#FFFFFF	11.68	1.00	21.00	1.00
#000000	1.80	21.00	1.00	21.00
##FFFFFF	11.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003C79

Deuteranopia (green-blind)

#003476

Tritanopia (blue-blind)

#00444F

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #1f3377;
/* rgb */ color: rgb(31, 51, 119);
/* oklch */ color: oklch(34.8% 0.119 267.4);

Tailwind

colors: {
  custom: {
    50: '#676a9f',
    500: '#1f3377',
    950: '#000000',
  },
}

SCSS

$custom: #1f3377;
$custom-light: #676a9f;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3377",
  "rgb": {
    "r": 31,
    "g": 51,
    "b": 119
  },
  "hsl": {
    "h": 226.364,
    "s": 58.667,
    "l": 29.412
  },
  "oklch": {
    "l": 0.34819,
    "c": 0.1191,
    "h": 267.4
  },
  "luminance": 0.03991
}

Semantic roles & 50–950 ramp

primary

#1F3377

secondary

#AB9447

accent

#BE46E2

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#07060E

muted

#7A7A7E

Preview Lab

Preview with #1F3377

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

Preview Lab → · Contrast checker → · Palette generator →