#1F3072#1F3072

#1F3072 is a dark, moderate blue. Relative luminance 0.036; OKLCH L 33.7% C 0.116 H 268.5°. Best body text is #FFFFFF at 12.18:1 contrast (WCAG AA passes).

Color values

HEX	#1F3072
RGB	rgb(31, 48, 114)
HSL	hsl(228, 57%, 28%)
HSV	hsv(228, 73%, 45%)
CMYK	cmyk(72.8%, 57.9%, 0%, 55.3%)
CIE-LAB	lab(22.37, 17.58, -40.19)
CIE-LCH	lch(22.37, 43.86, 293.63°)
OKLab	oklab(33.74% -0.0029 -0.1157)
OKLCH	oklch(33.74% 0.116 268.5)
XYZ	xyz(4.6582, 3.6197, 16.3695)
Luminance	0.0362 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3072 #72611F

analogous

#1F5972 #1F3072 #371F72

triadic

#1F3072 #721F30 #30721F

tetradic

#1F3072 #721F59 #72611F #1F7237

square

#1F3072 #721F59 #72611F #1F7237

split-complementary

#1F3072 #72371F #59721F

monochromatic

#070A18 #121C42 #1F3072 #2C44A2 #405DCB

Accessibility & contrast

On white

12.18

#1F3072 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.72

#1F3072 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3072

12.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3072	#FFFFFF	#000000	##FFFFFF
##1F3072	1.00	12.18	1.72	12.18
#FFFFFF	12.18	1.00	21.00	1.00
#000000	1.72	21.00	1.00	21.00
##FFFFFF	12.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003974

Deuteranopia (green-blind)

#003271

Tritanopia (blue-blind)

#00404C

Achromatopsia (no color)

#353535

Design tokens & code

CSS

--color: #1f3072;
/* rgb */ color: rgb(31, 48, 114);
/* oklch */ color: oklch(33.7% 0.116 268.5);

Tailwind

colors: {
  custom: {
    50: '#66679b',
    500: '#1f3072',
    950: '#000000',
  },
}

SCSS

$custom: #1f3072;
$custom-light: #66679b;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3072",
  "rgb": {
    "r": 31,
    "g": 48,
    "b": 114
  },
  "hsl": {
    "h": 227.711,
    "s": 57.241,
    "l": 28.431
  },
  "oklch": {
    "l": 0.33739,
    "c": 0.11573,
    "h": 268.5
  },
  "luminance": 0.0362
}

Semantic roles & 50–950 ramp

primary

#1F3072

secondary

#A69247

accent

#C147E0

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#07060E

muted

#7A7A7E

Preview Lab

Preview with #1F3072

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

Preview Lab → · Contrast checker → · Palette generator →