#1F318F#1F318F

#1F318F is a dark, vivid blue. Relative luminance 0.045; OKLCH L 36.6% C 0.156 H 268.7°. Best body text is #FFFFFF at 11.09:1 contrast (WCAG AA passes).

Color values

HEX	#1F318F
RGB	rgb(31, 49, 143)
HSL	hsl(230, 64%, 34%)
HSV	hsv(230, 78%, 56%)
CMYK	cmyk(78.3%, 65.7%, 0%, 43.9%)
CIE-LAB	lab(25.17, 28.26, -53.88)
CIE-LCH	lch(25.17, 60.84, 297.68°)
OKLab	oklab(36.6% -0.0036 -0.1559)
OKLCH	oklch(36.6% 0.156 268.7)
XYZ	xyz(6.6196, 4.4704, 26.4953)
Luminance	0.0447 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F318F #8F7D1F

analogous

#1F698F #1F318F #451F8F

triadic

#1F318F #8F1F31 #318F1F

tetradic

#1F318F #8F1F69 #8F7D1F #1F8F45

square

#1F318F #8F1F69 #8F7D1F #1F8F45

split-complementary

#1F318F #8F451F #698F1F

monochromatic

#090F2A #14205D #1F318F #2A42C1 #4F66D9

Accessibility & contrast

On white

11.09

#1F318F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.89

#1F318F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F318F

11.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F318F	#FFFFFF	#000000	##FFFFFF
##1F318F	1.00	11.09	1.89	11.09
#FFFFFF	11.09	1.00	21.00	1.00
#000000	1.89	21.00	1.00	21.00
##FFFFFF	11.09	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004192

Deuteranopia (green-blind)

#00368D

Tritanopia (blue-blind)

#004A5B

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #1f318f;
/* rgb */ color: rgb(31, 49, 143);
/* oklch */ color: oklch(36.6% 0.156 268.7);

Tailwind

colors: {
  custom: {
    50: '#6e69b1',
    500: '#1f318f',
    950: '#000000',
  },
}

SCSS

$custom: #1f318f;
$custom-light: #6e69b1;
$custom-dark: #000000;

JSON

{
  "hex": "#1f318f",
  "rgb": {
    "r": 31,
    "g": 49,
    "b": 143
  },
  "hsl": {
    "h": 230.357,
    "s": 64.368,
    "l": 34.118
  },
  "oklch": {
    "l": 0.36603,
    "c": 0.1559,
    "h": 268.7
  },
  "luminance": 0.04471
}

Semantic roles & 50–950 ramp

primary

#1F318F

secondary

#BCAA4E

accent

#CD40E7

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#080611

muted

#7B7A80

Preview Lab

Preview with #1F318F

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

Preview Lab → · Contrast checker → · Palette generator →