#1F237D#1F237D

#1F237D is a dark, vivid blue. Relative luminance 0.030; OKLCH L 32.3% C 0.148 H 272.6°. Best body text is #FFFFFF at 13.17:1 contrast (WCAG AA passes).

Color values

HEX	#1F237D
RGB	rgb(31, 35, 125)
HSL	hsl(237, 60%, 31%)
HSV	hsv(237, 75%, 49%)
CMYK	cmyk(75.2%, 72%, 0%, 51%)
CIE-LAB	lab(19.94, 30.76, -51.19)
CIE-LCH	lch(19.94, 59.72, 301.00°)
OKLab	oklab(32.26% 0.0066 -0.148)
OKLCH	oklch(32.26% 0.148 272.6)
XYZ	xyz(4.8665, 2.9735, 19.7155)
Luminance	0.0297 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F237D #7D791F

analogous

#1F527D #1F237D #4A1F7D

triadic

#1F237D #7D1F23 #237D1F

tetradic

#1F237D #7D1F52 #7D791F #1F7D4A

square

#1F237D #7D1F52 #7D791F #1F7D4A

split-complementary

#1F237D #7D4A1F #527D1F

monochromatic

#07081B #13154C #1F237D #2B31AE #454BD1

Accessibility & contrast

On white

13.17

#1F237D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.59

#1F237D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F237D

13.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F237D	#FFFFFF	#000000	##FFFFFF
##1F237D	1.00	13.17	1.59	13.17
#FFFFFF	13.17	1.00	21.00	1.00
#000000	1.59	21.00	1.00	21.00
##FFFFFF	13.17	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003580

Deuteranopia (green-blind)

#002C7B

Tritanopia (blue-blind)

#003C4D

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #1f237d;
/* rgb */ color: rgb(31, 35, 125);
/* oklch */ color: oklch(32.3% 0.148 272.6);

Tailwind

colors: {
  custom: {
    50: '#6a5ea4',
    500: '#1f237d',
    950: '#000000',
  },
}

SCSS

$custom: #1f237d;
$custom-light: #6a5ea4;
$custom-dark: #000000;

JSON

{
  "hex": "#1f237d",
  "rgb": {
    "r": 31,
    "g": 35,
    "b": 125
  },
  "hsl": {
    "h": 237.447,
    "s": 60.256,
    "l": 30.588
  },
  "oklch": {
    "l": 0.32256,
    "c": 0.1482,
    "h": 272.6
  },
  "luminance": 0.02974
}

Semantic roles & 50–950 ramp

primary

#1F237D

secondary

#B0AC48

accent

#DD44E3

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#08040F

muted

#7A797F

Preview Lab

Preview with #1F237D

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

Preview Lab → · Contrast checker → · Palette generator →