#1F43B2#1F43B2

#1F43B2 is a dark, vivid blue. Relative luminance 0.075; OKLCH L 43.3% C 0.181 H 265.4°. Best body text is #FFFFFF at 8.39:1 contrast (WCAG AA passes).

Color values

HEX	#1F43B2
RGB	rgb(31, 67, 178)
HSL	hsl(225, 70%, 41%)
HSV	hsv(225, 83%, 70%)
CMYK	cmyk(82.6%, 62.4%, 0%, 30.2%)
CIE-LAB	lab(32.96, 29.68, -62.33)
CIE-LCH	lch(32.96, 69.03, 295.46°)
OKLab	oklab(43.33% -0.0147 -0.1804)
OKLCH	oklch(43.33% 0.181 265.4)
XYZ	xyz(10.6053, 7.5187, 43.0032)
Luminance	0.0752 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F43B2 #B28E1F

analogous

#1F8CB2 #1F43B2 #441FB2

triadic

#1F43B2 #B21F43 #43B21F

tetradic

#1F43B2 #B21F8C #B28E1F #1FB244

square

#1F43B2 #B21F8C #B28E1F #1FB244

split-complementary

#1F43B2 #B2441F #8CB21F

monochromatic

#0D1C4A #162F7E #1F43B2 #335CDB #6786E5

Accessibility & contrast

On white

8.39

#1F43B2 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.50

#1F43B2 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F43B2

8.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F43B2	#FFFFFF	#000000	##FFFFFF
##1F43B2	1.00	8.39	2.50	8.39
#FFFFFF	8.39	1.00	21.00	1.00
#000000	2.50	21.00	1.00	21.00
##FFFFFF	8.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0055B6

Deuteranopia (green-blind)

#0047B0

Tritanopia (blue-blind)

#006074

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #1f43b2;
/* rgb */ color: rgb(31, 67, 178);
/* oklch */ color: oklch(43.3% 0.181 265.4);

Tailwind

colors: {
  custom: {
    50: '#7576ca',
    500: '#1f43b2',
    950: '#000000',
  },
}

SCSS

$custom: #1f43b2;
$custom-light: #7576ca;
$custom-dark: #000000;

JSON

{
  "hex": "#1f43b2",
  "rgb": {
    "r": 31,
    "g": 67,
    "b": 178
  },
  "hsl": {
    "h": 225.306,
    "s": 70.335,
    "l": 40.98
  },
  "oklch": {
    "l": 0.43328,
    "c": 0.18098,
    "h": 265.4
  },
  "luminance": 0.0752
}

Semantic roles & 50–950 ramp

primary

#1F43B2

secondary

#CAB163

accent

#C13BED

background

#F7F7FC

surface

#EEEDF8

border

#C9C8D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #1F43B2

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

Preview Lab → · Contrast checker → · Palette generator →