#1F2572#1F2572

#1F2572 is a dark, vivid blue. Relative luminance 0.028; OKLCH L 31.5% C 0.130 H 272.8°. Best body text is #FFFFFF at 13.41:1 contrast (WCAG AA passes).

Color values

HEX	#1F2572
RGB	rgb(31, 37, 114)
HSL	hsl(236, 57%, 28%)
HSV	hsv(236, 73%, 45%)
CMYK	cmyk(72.8%, 67.5%, 0%, 55.3%)
CIE-LAB	lab(19.35, 25.30, -45.12)
CIE-LCH	lch(19.35, 51.73, 299.28°)
OKLab	oklab(31.49% 0.0064 -0.1303)
OKLCH	oklch(31.49% 0.13 272.8)
XYZ	xyz(4.2629, 2.8289, 16.2377)
Luminance	0.0283 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F2572 #726C1F

analogous

#1F4E72 #1F2572 #421F72

triadic

#1F2572 #721F25 #25721F

tetradic

#1F2572 #721F4E #726C1F #1F7242

square

#1F2572 #721F4E #726C1F #1F7242

split-complementary

#1F2572 #72421F #4E721F

monochromatic

#070818 #121542 #1F2572 #2C35A2 #404ACB

Accessibility & contrast

On white

13.41

#1F2572 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.57

#1F2572 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F2572

13.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F2572	#FFFFFF	#000000	##FFFFFF
##1F2572	1.00	13.41	1.57	13.41
#FFFFFF	13.41	1.00	21.00	1.00
#000000	1.57	21.00	1.00	21.00
##FFFFFF	13.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003374

Deuteranopia (green-blind)

#002B71

Tritanopia (blue-blind)

#003948

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #1f2572;
/* rgb */ color: rgb(31, 37, 114);
/* oklch */ color: oklch(31.5% 0.130 272.8);

Tailwind

colors: {
  custom: {
    50: '#675f9b',
    500: '#1f2572',
    950: '#000000',
  },
}

SCSS

$custom: #1f2572;
$custom-light: #675f9b;
$custom-dark: #000000;

JSON

{
  "hex": "#1f2572",
  "rgb": {
    "r": 31,
    "g": 37,
    "b": 114
  },
  "hsl": {
    "h": 235.663,
    "s": 57.241,
    "l": 28.431
  },
  "oklch": {
    "l": 0.31494,
    "c": 0.13046,
    "h": 272.8
  },
  "luminance": 0.02829
}

Semantic roles & 50–950 ramp

primary

#1F2572

secondary

#A69F47

accent

#D547E0

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#07040E

muted

#7A797E

Preview Lab

Preview with #1F2572

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

Preview Lab → · Contrast checker → · Palette generator →