#1F238F#1F238F

#1F238F is a dark, vivid blue. Relative luminance 0.035; OKLCH L 34.2% C 0.172 H 271.3°. Best body text is #FFFFFF at 12.39:1 contrast (WCAG AA passes).

Color values

HEX	#1F238F
RGB	rgb(31, 35, 143)
HSL	hsl(238, 64%, 34%)
HSV	hsv(238, 78%, 56%)
CMYK	cmyk(78.3%, 75.5%, 0%, 43.9%)
CIE-LAB	lab(21.86, 37.25, -59.33)
CIE-LCH	lch(21.86, 70.06, 302.12°)
OKLab	oklab(34.21% 0.0038 -0.1718)
OKLCH	oklch(34.21% 0.172 271.3)
XYZ	xyz(6.1224, 3.4759, 26.3295)
Luminance	0.0348 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F238F #8F8B1F

analogous

#1F5B8F #1F238F #531F8F

triadic

#1F238F #8F1F23 #238F1F

tetradic

#1F238F #8F1F5B #8F8B1F #1F8F53

square

#1F238F #8F1F5B #8F8B1F #1F8F53

split-complementary

#1F238F #8F531F #5B8F1F

monochromatic

#090A2A #14175D #1F238F #2A2FC1 #4F54D9

Accessibility & contrast

On white

12.39

#1F238F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.70

#1F238F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F238F

12.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F238F	#FFFFFF	#000000	##FFFFFF
##1F238F	1.00	12.39	1.70	12.39
#FFFFFF	12.39	1.00	21.00	1.00
#000000	1.70	21.00	1.00	21.00
##FFFFFF	12.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003A92

Deuteranopia (green-blind)

#002F8D

Tritanopia (blue-blind)

#004257

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #1f238f;
/* rgb */ color: rgb(31, 35, 143);
/* oklch */ color: oklch(34.2% 0.172 271.3);

Tailwind

colors: {
  custom: {
    50: '#6f5fb1',
    500: '#1f238f',
    950: '#000000',
  },
}

SCSS

$custom: #1f238f;
$custom-light: #6f5fb1;
$custom-dark: #000000;

JSON

{
  "hex": "#1f238f",
  "rgb": {
    "r": 31,
    "g": 35,
    "b": 143
  },
  "hsl": {
    "h": 237.857,
    "s": 64.368,
    "l": 34.118
  },
  "oklch": {
    "l": 0.34205,
    "c": 0.17182,
    "h": 271.3
  },
  "luminance": 0.03477
}

Semantic roles & 50–950 ramp

primary

#1F238F

secondary

#BCB84E

accent

#E140E7

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#090511

muted

#7B7980

Preview Lab

Preview with #1F238F

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

Preview Lab → · Contrast checker → · Palette generator →