#1F237C#1F237C

#1F237C is a dark, vivid blue. Relative luminance 0.029; OKLCH L 32.2% C 0.147 H 272.6°. Best body text is #FFFFFF at 13.21:1 contrast (WCAG AA passes).

Color values

HEX	#1F237C
RGB	rgb(31, 35, 124)
HSL	hsl(237, 60%, 30%)
HSV	hsv(237, 75%, 49%)
CMYK	cmyk(75%, 71.8%, 0%, 51.4%)
CIE-LAB	lab(19.83, 30.39, -50.72)
CIE-LCH	lch(19.83, 59.13, 300.93°)
OKLab	oklab(32.15% 0.0067 -0.1467)
OKLCH	oklch(32.15% 0.147 272.6)
XYZ	xyz(4.8030, 2.9481, 19.3808)
Luminance	0.0295 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F237C #7C781F

analogous

#1F527C #1F237C #491F7C

triadic

#1F237C #7C1F23 #237C1F

tetradic

#1F237C #7C1F52 #7C781F #1F7C49

square

#1F237C #7C1F52 #7C781F #1F7C49

split-complementary

#1F237C #7C491F #527C1F

monochromatic

#07071A #13154B #1F237C #2B31AD #454BD0

Accessibility & contrast

On white

13.21

#1F237C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.59

#1F237C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F237C

13.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F237C	#FFFFFF	#000000	##FFFFFF
##1F237C	1.00	13.21	1.59	13.21
#FFFFFF	13.21	1.00	21.00	1.00
#000000	1.59	21.00	1.00	21.00
##FFFFFF	13.21	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00347F

Deuteranopia (green-blind)

#002C7A

Tritanopia (blue-blind)

#003B4C

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #1f237c;
/* rgb */ color: rgb(31, 35, 124);
/* oklch */ color: oklch(32.2% 0.147 272.6);

Tailwind

colors: {
  custom: {
    50: '#6a5ea3',
    500: '#1f237c',
    950: '#000000',
  },
}

SCSS

$custom: #1f237c;
$custom-light: #6a5ea3;
$custom-dark: #000000;

JSON

{
  "hex": "#1f237c",
  "rgb": {
    "r": 31,
    "g": 35,
    "b": 124
  },
  "hsl": {
    "h": 237.419,
    "s": 60,
    "l": 30.392
  },
  "oklch": {
    "l": 0.32151,
    "c": 0.14683,
    "h": 272.6
  },
  "luminance": 0.02949
}

Semantic roles & 50–950 ramp

primary

#1F237C

secondary

#AFAB48

accent

#DC45E3

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#07040F

muted

#7A797F

Preview Lab

Preview with #1F237C

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

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