#1F3D72#1F3D72

#1F3D72 is a dark, moderate blue. Relative luminance 0.048; OKLCH L 36.7% C 0.098 H 260.9°. Best body text is #FFFFFF at 10.67:1 contrast (WCAG AA passes).

Color values

HEX	#1F3D72
RGB	rgb(31, 61, 114)
HSL	hsl(218, 57%, 28%)
HSV	hsv(218, 73%, 45%)
CMYK	cmyk(72.8%, 46.5%, 0%, 55.3%)
CIE-LAB	lab(26.28, 8.40, -33.88)
CIE-LCH	lch(26.28, 34.91, 283.93°)
OKLab	oklab(36.72% -0.0156 -0.0969)
OKLCH	oklch(36.72% 0.098 260.9)
XYZ	xyz(5.2700, 4.8432, 16.5734)
Luminance	0.0484 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3D72 #72541F

analogous

#1F6672 #1F3D72 #2A1F72

triadic

#1F3D72 #721F3D #3D721F

tetradic

#1F3D72 #721F66 #72541F #1F722A

square

#1F3D72 #721F66 #72541F #1F722A

split-complementary

#1F3D72 #722A1F #66721F

monochromatic

#070D18 #122342 #1F3D72 #2C57A2 #4072CB

Accessibility & contrast

On white

10.67

#1F3D72 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.97

#1F3D72 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3D72

10.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3D72	#FFFFFF	#000000	##FFFFFF
##1F3D72	1.00	10.67	1.97	10.67
#FFFFFF	10.67	1.00	21.00	1.00
#000000	1.97	21.00	1.00	21.00
##FFFFFF	10.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#234274

Deuteranopia (green-blind)

#143B71

Tritanopia (blue-blind)

#004952

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #1f3d72;
/* rgb */ color: rgb(31, 61, 114);
/* oklch */ color: oklch(36.7% 0.098 260.9);

Tailwind

colors: {
  custom: {
    50: '#66729b',
    500: '#1f3d72',
    950: '#000000',
  },
}

SCSS

$custom: #1f3d72;
$custom-light: #66729b;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3d72",
  "rgb": {
    "r": 31,
    "g": 61,
    "b": 114
  },
  "hsl": {
    "h": 218.313,
    "s": 57.241,
    "l": 28.431
  },
  "oklch": {
    "l": 0.36718,
    "c": 0.09816,
    "h": 260.9
  },
  "luminance": 0.04844
}

Semantic roles & 50–950 ramp

primary

#1F3D72

secondary

#A68447

accent

#A947E0

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070E

muted

#7A7A7E

Preview Lab

Preview with #1F3D72

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

Preview Lab → · Contrast checker → · Palette generator →