#1F4AAD#1F4AAD

#1F4AAD is a dark, vivid blue. Relative luminance 0.082; OKLCH L 44.3% C 0.166 H 263.4°. Best body text is #FFFFFF at 7.95:1 contrast (WCAG AA passes).

Color values

HEX	#1F4AAD
RGB	rgb(31, 74, 173)
HSL	hsl(222, 70%, 40%)
HSV	hsv(222, 82%, 68%)
CMYK	cmyk(82.1%, 57.2%, 0%, 32.2%)
CIE-LAB	lab(34.41, 23.06, -56.99)
CIE-LCH	lch(34.41, 61.48, 292.03°)
OKLab	oklab(44.28% -0.019 -0.1646)
OKLCH	oklch(44.28% 0.166 263.4)
XYZ	xyz(10.5540, 8.2047, 40.5545)
Luminance	0.0821 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4AAD #AD821F

analogous

#1F91AD #1F4AAD #3B1FAD

triadic

#1F4AAD #AD1F4A #4AAD1F

tetradic

#1F4AAD #AD1F91 #AD821F #1FAD3B

square

#1F4AAD #AD1F91 #AD821F #1FAD3B

split-complementary

#1F4AAD #AD3B1F #91AD1F

monochromatic

#0C1E45 #163479 #1F4AAD #2F63DA #638AE3

Accessibility & contrast

On white

7.95

#1F4AAD on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.64

#1F4AAD on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4AAD

7.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4AAD	#FFFFFF	#000000	##FFFFFF
##1F4AAD	1.00	7.95	2.64	7.95
#FFFFFF	7.95	1.00	21.00	1.00
#000000	2.64	21.00	1.00	21.00
##FFFFFF	7.95	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0058B0

Deuteranopia (green-blind)

#004BAB

Tritanopia (blue-blind)

#006374

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #1f4aad;
/* rgb */ color: rgb(31, 74, 173);
/* oklch */ color: oklch(44.3% 0.166 263.4);

Tailwind

colors: {
  custom: {
    50: '#747bc6',
    500: '#1f4aad',
    950: '#000000',
  },
}

SCSS

$custom: #1f4aad;
$custom-light: #747bc6;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4aad",
  "rgb": {
    "r": 31,
    "g": 74,
    "b": 173
  },
  "hsl": {
    "h": 221.831,
    "s": 69.608,
    "l": 40
  },
  "oklch": {
    "l": 0.4428,
    "c": 0.16573,
    "h": 263.4
  },
  "luminance": 0.08206
}

Semantic roles & 50–950 ramp

primary

#1F4AAD

secondary

#C8A860

accent

#B73BEC

background

#F7F7FC

surface

#EEEDF8

border

#C9C8D1

text

#0A0913

muted

#7C7B82

Preview Lab

Preview with #1F4AAD

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

Preview Lab → · Contrast checker → · Palette generator →