#1F4BB2#1F4BB2

#1F4BB2 is a dark, vivid blue. Relative luminance 0.085; OKLCH L 44.9% C 0.171 H 263.5°. Best body text is #FFFFFF at 7.76:1 contrast (WCAG AA passes).

Color values

HEX	#1F4BB2
RGB	rgb(31, 75, 178)
HSL	hsl(222, 70%, 41%)
HSV	hsv(222, 83%, 70%)
CMYK	cmyk(82.6%, 57.9%, 0%, 30.2%)
CIE-LAB	lab(35.08, 24.35, -58.87)
CIE-LCH	lch(35.08, 63.70, 292.47°)
OKLab	oklab(44.91% -0.0193 -0.1701)
OKLCH	oklch(44.91% 0.171 263.5)
XYZ	xyz(11.1142, 8.5365, 43.1728)
Luminance	0.0854 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4BB2 #B2861F

analogous

#1F94B2 #1F4BB2 #3C1FB2

triadic

#1F4BB2 #B21F4B #4BB21F

tetradic

#1F4BB2 #B21F94 #B2861F #1FB23C

square

#1F4BB2 #B21F94 #B2861F #1FB23C

split-complementary

#1F4BB2 #B23C1F #94B21F

monochromatic

#0D1F4A #16357E #1F4BB2 #3365DB #678CE5

Accessibility & contrast

On white

7.76

#1F4BB2 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.71

#1F4BB2 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4BB2

7.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4BB2	#FFFFFF	#000000	##FFFFFF
##1F4BB2	1.00	7.76	2.71	7.76
#FFFFFF	7.76	1.00	21.00	1.00
#000000	2.71	21.00	1.00	21.00
##FFFFFF	7.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0059B5

Deuteranopia (green-blind)

#004CB0

Tritanopia (blue-blind)

#006577

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #1f4bb2;
/* rgb */ color: rgb(31, 75, 178);
/* oklch */ color: oklch(44.9% 0.171 263.5);

Tailwind

colors: {
  custom: {
    50: '#757cca',
    500: '#1f4bb2',
    950: '#000000',
  },
}

SCSS

$custom: #1f4bb2;
$custom-light: #757cca;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4bb2",
  "rgb": {
    "r": 31,
    "g": 75,
    "b": 178
  },
  "hsl": {
    "h": 222.041,
    "s": 70.335,
    "l": 40.98
  },
  "oklch": {
    "l": 0.44909,
    "c": 0.17123,
    "h": 263.5
  },
  "luminance": 0.08538
}

Semantic roles & 50–950 ramp

primary

#1F4BB2

secondary

#CAAB63

accent

#B83BED

background

#F7F7FC

surface

#EEEEF8

border

#C9C9D1

text

#0A0913

muted

#7C7B82

Preview Lab

Preview with #1F4BB2

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

Preview Lab → · Contrast checker → · Palette generator →