#1F238A#1F238A

#1F238A is a dark, vivid blue. Relative luminance 0.033; OKLCH L 33.7% C 0.165 H 271.6°. Best body text is #FFFFFF at 12.61:1 contrast (WCAG AA passes).

Color values

HEX	#1F238A
RGB	rgb(31, 35, 138)
HSL	hsl(238, 63%, 33%)
HSV	hsv(238, 78%, 54%)
CMYK	cmyk(77.5%, 74.6%, 0%, 45.9%)
CIE-LAB	lab(21.31, 35.48, -57.12)
CIE-LCH	lch(21.31, 67.24, 301.85°)
OKLab	oklab(33.65% 0.0047 -0.1653)
OKLCH	oklch(33.65% 0.165 271.6)
XYZ	xyz(5.7520, 3.3277, 24.3790)
Luminance	0.0333 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F238A #8A861F

analogous

#1F588A #1F238A #501F8A

triadic

#1F238A #8A1F23 #238A1F

tetradic

#1F238A #8A1F58 #8A861F #1F8A50

square

#1F238A #8A1F58 #8A861F #1F8A50

split-complementary

#1F238A #8A501F #588A1F

monochromatic

#090A26 #141658 #1F238A #2A30BC #4C52D7

Accessibility & contrast

On white

12.61

#1F238A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.67

#1F238A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F238A

12.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F238A	#FFFFFF	#000000	##FFFFFF
##1F238A	1.00	12.61	1.67	12.61
#FFFFFF	12.61	1.00	21.00	1.00
#000000	1.67	21.00	1.00	21.00
##FFFFFF	12.61	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00388D

Deuteranopia (green-blind)

#002E88

Tritanopia (blue-blind)

#004154

Achromatopsia (no color)

#333333

Design tokens & code

CSS

--color: #1f238a;
/* rgb */ color: rgb(31, 35, 138);
/* oklch */ color: oklch(33.7% 0.165 271.6);

Tailwind

colors: {
  custom: {
    50: '#6e5fad',
    500: '#1f238a',
    950: '#000000',
  },
}

SCSS

$custom: #1f238a;
$custom-light: #6e5fad;
$custom-dark: #000000;

JSON

{
  "hex": "#1f238a",
  "rgb": {
    "r": 31,
    "g": 35,
    "b": 138
  },
  "hsl": {
    "h": 237.757,
    "s": 63.314,
    "l": 33.137
  },
  "oklch": {
    "l": 0.33654,
    "c": 0.1654,
    "h": 271.6
  },
  "luminance": 0.03328
}

Semantic roles & 50–950 ramp

primary

#1F238A

secondary

#BAB54B

accent

#E041E6

background

#F7F5FA

surface

#EDE9F4

border

#C8C5CE

text

#080410

muted

#7B797F

Preview Lab

Preview with #1F238A

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

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