#1F43A8#1F43A8

#1F43A8 is a dark, vivid blue. Relative luminance 0.071; OKLCH L 42.4% C 0.168 H 264.9°. Best body text is #FFFFFF at 8.65:1 contrast (WCAG AA passes).

Color values

HEX	#1F43A8
RGB	rgb(31, 67, 168)
HSL	hsl(224, 69%, 39%)
HSV	hsv(224, 82%, 66%)
CMYK	cmyk(81.5%, 60.1%, 0%, 34.1%)
CIE-LAB	lab(32.10, 25.81, -57.76)
CIE-LCH	lch(32.10, 63.26, 294.08°)
OKLab	oklab(42.43% -0.0148 -0.167)
OKLCH	oklch(42.43% 0.168 264.9)
XYZ	xyz(9.6376, 7.1316, 37.9068)
Luminance	0.0713 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F43A8 #A8841F

analogous

#1F88A8 #1F43A8 #401FA8

triadic

#1F43A8 #A81F43 #43A81F

tetradic

#1F43A8 #A81F88 #A8841F #1FA840

square

#1F43A8 #A81F88 #A8841F #1FA840

split-complementary

#1F43A8 #A8401F #88A81F

monochromatic

#0C1A41 #152E74 #1F43A8 #2C59D8 #6082E2

Accessibility & contrast

On white

8.65

#1F43A8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.43

#1F43A8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F43A8

8.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F43A8	#FFFFFF	#000000	##FFFFFF
##1F43A8	1.00	8.65	2.43	8.65
#FFFFFF	8.65	1.00	21.00	1.00
#000000	2.43	21.00	1.00	21.00
##FFFFFF	8.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052AB

Deuteranopia (green-blind)

#0045A6

Tritanopia (blue-blind)

#005D6F

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #1f43a8;
/* rgb */ color: rgb(31, 67, 168);
/* oklch */ color: oklch(42.4% 0.168 264.9);

Tailwind

colors: {
  custom: {
    50: '#7376c3',
    500: '#1f43a8',
    950: '#000000',
  },
}

SCSS

$custom: #1f43a8;
$custom-light: #7376c3;
$custom-dark: #000000;

JSON

{
  "hex": "#1f43a8",
  "rgb": {
    "r": 31,
    "g": 67,
    "b": 168
  },
  "hsl": {
    "h": 224.234,
    "s": 68.844,
    "l": 39.02
  },
  "oklch": {
    "l": 0.42427,
    "c": 0.16766,
    "h": 264.9
  },
  "luminance": 0.07133
}

Semantic roles & 50–950 ramp

primary

#1F43A8

secondary

#C6AA5D

accent

#BE3CEC

background

#F7F7FC

surface

#EEEDF8

border

#C9C8D1

text

#090813

muted

#7B7B82

Preview Lab

Preview with #1F43A8

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

Preview Lab → · Contrast checker → · Palette generator →