#1F238E#1F238E

#1F238E is a dark, vivid blue. Relative luminance 0.034; OKLCH L 34.1% C 0.171 H 271.3°. Best body text is #FFFFFF at 12.43:1 contrast (WCAG AA passes).

Color values

HEX	#1F238E
RGB	rgb(31, 35, 142)
HSL	hsl(238, 64%, 34%)
HSV	hsv(238, 78%, 56%)
CMYK	cmyk(78.2%, 75.4%, 0%, 44.3%)
CIE-LAB	lab(21.75, 36.90, -58.89)
CIE-LCH	lch(21.75, 69.50, 302.07°)
OKLab	oklab(34.09% 0.004 -0.1705)
OKLCH	oklch(34.09% 0.171 271.3)
XYZ	xyz(6.0469, 3.4457, 25.9323)
Luminance	0.0345 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F238E #8E8A1F

analogous

#1F5B8E #1F238E #531F8E

triadic

#1F238E #8E1F23 #238E1F

tetradic

#1F238E #8E1F5B #8E8A1F #1F8E53

square

#1F238E #8E1F5B #8E8A1F #1F8E53

split-complementary

#1F238E #8E531F #5B8E1F

monochromatic

#090A2A #14175C #1F238E #2A2FC0 #4F54D9

Accessibility & contrast

On white

12.43

#1F238E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.69

#1F238E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F238E

12.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F238E	#FFFFFF	#000000	##FFFFFF
##1F238E	1.00	12.43	1.69	12.43
#FFFFFF	12.43	1.00	21.00	1.00
#000000	1.69	21.00	1.00	21.00
##FFFFFF	12.43	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003A91

Deuteranopia (green-blind)

#002F8C

Tritanopia (blue-blind)

#004256

Achromatopsia (no color)

#343434

Design tokens & code

CSS

--color: #1f238e;
/* rgb */ color: rgb(31, 35, 142);
/* oklch */ color: oklch(34.1% 0.171 271.3);

Tailwind

colors: {
  custom: {
    50: '#6f5fb0',
    500: '#1f238e',
    950: '#000000',
  },
}

SCSS

$custom: #1f238e;
$custom-light: #6f5fb0;
$custom-dark: #000000;

JSON

{
  "hex": "#1f238e",
  "rgb": {
    "r": 31,
    "g": 35,
    "b": 142
  },
  "hsl": {
    "h": 237.838,
    "s": 64.162,
    "l": 33.922
  },
  "oklch": {
    "l": 0.34094,
    "c": 0.17055,
    "h": 271.3
  },
  "luminance": 0.03446
}

Semantic roles & 50–950 ramp

primary

#1F238E

secondary

#BBB74D

accent

#E141E7

background

#F7F5FB

surface

#EDE9F6

border

#C8C5D0

text

#090411

muted

#7B7980

Preview Lab

Preview with #1F238E

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

Preview Lab → · Contrast checker → · Palette generator →