#1F4AB4#1F4AB4

#1F4AB4 is a dark, vivid blue. Relative luminance 0.085; OKLCH L 44.9% C 0.175 H 263.9°. Best body text is #FFFFFF at 7.79:1 contrast (WCAG AA passes).

Color values

HEX	#1F4AB4
RGB	rgb(31, 74, 180)
HSL	hsl(223, 71%, 41%)
HSV	hsv(223, 83%, 71%)
CMYK	cmyk(82.8%, 58.9%, 0%, 29.4%)
CIE-LAB	lab(34.97, 25.79, -60.23)
CIE-LCH	lch(34.97, 65.52, 293.18°)
OKLab	oklab(44.88% -0.0186 -0.1741)
OKLCH	oklch(44.88% 0.175 263.9)
XYZ	xyz(11.2491, 8.4828, 44.2156)
Luminance	0.0848 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4AB4 #B4891F

analogous

#1F95B4 #1F4AB4 #3F1FB4

triadic

#1F4AB4 #B41F4A #4AB41F

tetradic

#1F4AB4 #B41F95 #B4891F #1FB43F

square

#1F4AB4 #B41F95 #B4891F #1FB43F

split-complementary

#1F4AB4 #B43F1F #95B41F

monochromatic

#0D1F4C #163580 #1F4AB4 #3465DC #688CE5

Accessibility & contrast

On white

7.79

#1F4AB4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.70

#1F4AB4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4AB4

7.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4AB4	#FFFFFF	#000000	##FFFFFF
##1F4AB4	1.00	7.79	2.70	7.79
#FFFFFF	7.79	1.00	21.00	1.00
#000000	2.70	21.00	1.00	21.00
##FFFFFF	7.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0059B8

Deuteranopia (green-blind)

#004CB2

Tritanopia (blue-blind)

#006577

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #1f4ab4;
/* rgb */ color: rgb(31, 74, 180);
/* oklch */ color: oklch(44.9% 0.175 263.9);

Tailwind

colors: {
  custom: {
    50: '#757ccb',
    500: '#1f4ab4',
    950: '#000000',
  },
}

SCSS

$custom: #1f4ab4;
$custom-light: #757ccb;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4ab4",
  "rgb": {
    "r": 31,
    "g": 74,
    "b": 180
  },
  "hsl": {
    "h": 222.685,
    "s": 70.616,
    "l": 41.373
  },
  "oklch": {
    "l": 0.44879,
    "c": 0.17513,
    "h": 263.9
  },
  "luminance": 0.08484
}

Semantic roles & 50–950 ramp

primary

#1F4AB4

secondary

#CBAD64

accent

#BA3AED

background

#F7F7FC

surface

#EEEDF9

border

#C9C8D2

text

#0A0913

muted

#7C7B82

Preview Lab

Preview with #1F4AB4

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

Preview Lab → · Contrast checker → · Palette generator →