#1F319F#1F319F

#1F319F is a dark, vivid blue. Relative luminance 0.050; OKLCH L 38.2% C 0.177 H 268.5°. Best body text is #FFFFFF at 10.51:1 contrast (WCAG AA passes).

Color values

HEX	#1F319F
RGB	rgb(31, 49, 159)
HSL	hsl(232, 67%, 37%)
HSV	hsv(232, 81%, 62%)
CMYK	cmyk(80.5%, 69.2%, 0%, 37.6%)
CIE-LAB	lab(26.71, 34.30, -61.17)
CIE-LCH	lch(26.71, 70.13, 299.28°)
OKLab	oklab(38.19% -0.0046 -0.1772)
OKLCH	oklch(38.19% 0.177 268.5)
XYZ	xyz(7.9192, 4.9902, 33.3400)
Luminance	0.0499 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F319F #9F8D1F

analogous

#1F719F #1F319F #4D1F9F

triadic

#1F319F #9F1F31 #319F1F

tetradic

#1F319F #9F1F71 #9F8D1F #1F9F4D

square

#1F319F #9F1F71 #9F8D1F #1F9F4D

split-complementary

#1F319F #9F4D1F #719F1F

monochromatic

#0B1139 #15216C #1F319F #2941D2 #5A6CDF

Accessibility & contrast

On white

10.51

#1F319F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.00

#1F319F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F319F

10.51:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F319F	#FFFFFF	#000000	##FFFFFF
##1F319F	1.00	10.51	2.00	10.51
#FFFFFF	10.51	1.00	21.00	1.00
#000000	2.00	21.00	1.00	21.00
##FFFFFF	10.51	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0045A2

Deuteranopia (green-blind)

#00399D

Tritanopia (blue-blind)

#004F64

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #1f319f;
/* rgb */ color: rgb(31, 49, 159);
/* oklch */ color: oklch(38.2% 0.177 268.5);

Tailwind

colors: {
  custom: {
    50: '#7269bc',
    500: '#1f319f',
    950: '#000000',
  },
}

SCSS

$custom: #1f319f;
$custom-light: #7269bc;
$custom-dark: #000000;

JSON

{
  "hex": "#1f319f",
  "rgb": {
    "r": 31,
    "g": 49,
    "b": 159
  },
  "hsl": {
    "h": 231.563,
    "s": 67.368,
    "l": 37.255
  },
  "oklch": {
    "l": 0.38194,
    "c": 0.17722,
    "h": 268.5
  },
  "luminance": 0.04991
}

Semantic roles & 50–950 ramp

primary

#1F319F

secondary

#C3B457

accent

#D23EEA

background

#F7F6FB

surface

#EEEBF7

border

#C9C6D0

text

#090612

muted

#7B7A81

Preview Lab

Preview with #1F319F

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

Preview Lab → · Contrast checker → · Palette generator →