#1F3E72#1F3E72

#1F3E72 is a dark, moderate blue. Relative luminance 0.050; OKLCH L 37.0% C 0.097 H 260.1°. Best body text is #FFFFFF at 10.55:1 contrast (WCAG AA passes).

Color values

HEX	#1F3E72
RGB	rgb(31, 62, 114)
HSL	hsl(218, 57%, 28%)
HSV	hsv(218, 73%, 45%)
CMYK	cmyk(72.8%, 45.6%, 0%, 55.3%)
CIE-LAB	lab(26.59, 7.71, -33.39)
CIE-LCH	lch(26.59, 34.27, 283.01°)
OKLab	oklab(36.96% -0.0166 -0.0954)
OKLCH	oklch(36.96% 0.097 260.1)
XYZ	xyz(5.3239, 4.9509, 16.5914)
Luminance	0.0495 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3E72 #72531F

analogous

#1F6772 #1F3E72 #291F72

triadic

#1F3E72 #721F3E #3E721F

tetradic

#1F3E72 #721F67 #72531F #1F7229

square

#1F3E72 #721F67 #72531F #1F7229

split-complementary

#1F3E72 #72291F #67721F

monochromatic

#070D18 #122442 #1F3E72 #2C58A2 #4074CB

Accessibility & contrast

On white

10.55

#1F3E72 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.99

#1F3E72 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3E72

10.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3E72	#FFFFFF	#000000	##FFFFFF
##1F3E72	1.00	10.55	1.99	10.55
#FFFFFF	10.55	1.00	21.00	1.00
#000000	1.99	21.00	1.00	21.00
##FFFFFF	10.55	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#254374

Deuteranopia (green-blind)

#163B71

Tritanopia (blue-blind)

#004A52

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #1f3e72;
/* rgb */ color: rgb(31, 62, 114);
/* oklch */ color: oklch(37.0% 0.097 260.1);

Tailwind

colors: {
  custom: {
    50: '#66729b',
    500: '#1f3e72',
    950: '#000000',
  },
}

SCSS

$custom: #1f3e72;
$custom-light: #66729b;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3e72",
  "rgb": {
    "r": 31,
    "g": 62,
    "b": 114
  },
  "hsl": {
    "h": 217.59,
    "s": 57.241,
    "l": 28.431
  },
  "oklch": {
    "l": 0.36958,
    "c": 0.09687,
    "h": 260.1
  },
  "luminance": 0.04951
}

Semantic roles & 50–950 ramp

primary

#1F3E72

secondary

#A68247

accent

#A747E0

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06080E

muted

#7A7B7E

Preview Lab

Preview with #1F3E72

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

Preview Lab → · Contrast checker → · Palette generator →