#1F238D#1F238D

#1F238D is a dark, vivid blue. Relative luminance 0.034; OKLCH L 34.0% C 0.169 H 271.4°. Best body text is #FFFFFF at 12.48:1 contrast (WCAG AA passes).

Color values

HEX	#1F238D
RGB	rgb(31, 35, 141)
HSL	hsl(238, 64%, 34%)
HSV	hsv(238, 78%, 55%)
CMYK	cmyk(78%, 75.2%, 0%, 44.7%)
CIE-LAB	lab(21.64, 36.55, -58.45)
CIE-LCH	lch(21.64, 68.93, 302.02°)
OKLab	oklab(33.98% 0.0042 -0.1692)
OKLCH	oklch(33.98% 0.169 271.4)
XYZ	xyz(5.9722, 3.4158, 25.5387)
Luminance	0.0342 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F238D #8D891F

analogous

#1F5A8D #1F238D #521F8D

triadic

#1F238D #8D1F23 #238D1F

tetradic

#1F238D #8D1F5A #8D891F #1F8D52

square

#1F238D #8D1F5A #8D891F #1F8D52

split-complementary

#1F238D #8D521F #5A8D1F

monochromatic

#090A29 #14175B #1F238D #2A2FBF #4E53D8

Accessibility & contrast

On white

12.48

#1F238D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.68

#1F238D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F238D

12.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F238D	#FFFFFF	#000000	##FFFFFF
##1F238D	1.00	12.48	1.68	12.48
#FFFFFF	12.48	1.00	21.00	1.00
#000000	1.68	21.00	1.00	21.00
##FFFFFF	12.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003990

Deuteranopia (green-blind)

#002E8B

Tritanopia (blue-blind)

#004256

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #1f238d;
/* rgb */ color: rgb(31, 35, 141);
/* oklch */ color: oklch(34.0% 0.169 271.4);

Tailwind

colors: {
  custom: {
    50: '#6f5faf',
    500: '#1f238d',
    950: '#000000',
  },
}

SCSS

$custom: #1f238d;
$custom-light: #6f5faf;
$custom-dark: #000000;

JSON

{
  "hex": "#1f238d",
  "rgb": {
    "r": 31,
    "g": 35,
    "b": 141
  },
  "hsl": {
    "h": 237.818,
    "s": 63.953,
    "l": 33.725
  },
  "oklch": {
    "l": 0.33984,
    "c": 0.16926,
    "h": 271.4
  },
  "luminance": 0.03416
}

Semantic roles & 50–950 ramp

primary

#1F238D

secondary

#BBB74D

accent

#E141E7

background

#F7F5FA

surface

#EDE9F5

border

#C8C5CF

text

#090411

muted

#7B7980

Preview Lab

Preview with #1F238D

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

Preview Lab → · Contrast checker → · Palette generator →