#1F3271#1F3271

#1F3271 is a dark, moderate blue. Relative luminance 0.038; OKLCH L 34.1% C 0.111 H 267.5°. Best body text is #FFFFFF at 11.98:1 contrast (WCAG AA passes).

Color values

HEX	#1F3271
RGB	rgb(31, 50, 113)
HSL	hsl(226, 57%, 28%)
HSV	hsv(226, 73%, 44%)
CMYK	cmyk(72.6%, 55.8%, 0%, 55.7%)
CIE-LAB	lab(22.88, 15.76, -38.73)
CIE-LCH	lch(22.88, 41.81, 292.14°)
OKLab	oklab(34.09% -0.0049 -0.1114)
OKLCH	oklch(34.09% 0.111 267.5)
XYZ	xyz(4.6853, 3.7643, 16.0992)
Luminance	0.0377 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3271 #715E1F

analogous

#1F5B71 #1F3271 #351F71

triadic

#1F3271 #711F32 #32711F

tetradic

#1F3271 #711F5B #715E1F #1F7135

square

#1F3271 #711F5B #715E1F #1F7135

split-complementary

#1F3271 #71351F #5B711F

monochromatic

#070B18 #121D41 #1F3271 #2C47A1 #4060CB

Accessibility & contrast

On white

11.98

#1F3271 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.75

#1F3271 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3271

11.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3271	#FFFFFF	#000000	##FFFFFF
##1F3271	1.00	11.98	1.75	11.98
#FFFFFF	11.98	1.00	21.00	1.00
#000000	1.75	21.00	1.00	21.00
##FFFFFF	11.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#063B73

Deuteranopia (green-blind)

#003370

Tritanopia (blue-blind)

#00414C

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #1f3271;
/* rgb */ color: rgb(31, 50, 113);
/* oklch */ color: oklch(34.1% 0.111 267.5);

Tailwind

colors: {
  custom: {
    50: '#66699a',
    500: '#1f3271',
    950: '#000000',
  },
}

SCSS

$custom: #1f3271;
$custom-light: #66699a;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3271",
  "rgb": {
    "r": 31,
    "g": 50,
    "b": 113
  },
  "hsl": {
    "h": 226.098,
    "s": 56.944,
    "l": 28.235
  },
  "oklch": {
    "l": 0.34094,
    "c": 0.11147,
    "h": 267.5
  },
  "luminance": 0.03765
}

Semantic roles & 50–950 ramp

primary

#1F3271

secondary

#A58F47

accent

#BD48E0

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06060E

muted

#7A7A7E

Preview Lab

Preview with #1F3271

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

Preview Lab → · Contrast checker → · Palette generator →