#1F319C#1F319C

#1F319C is a dark, vivid blue. Relative luminance 0.049; OKLCH L 37.9% C 0.173 H 268.5°. Best body text is #FFFFFF at 10.62:1 contrast (WCAG AA passes).

Color values

HEX	#1F319C
RGB	rgb(31, 49, 156)
HSL	hsl(231, 67%, 37%)
HSV	hsv(231, 80%, 61%)
CMYK	cmyk(80.1%, 68.6%, 0%, 38.8%)
CIE-LAB	lab(26.41, 33.18, -59.83)
CIE-LCH	lch(26.41, 68.42, 299.02°)
OKLab	oklab(37.89% -0.0044 -0.1732)
OKLCH	oklch(37.89% 0.173 268.5)
XYZ	xyz(7.6621, 4.8874, 31.9856)
Luminance	0.0489 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F319C #9C8A1F

analogous

#1F709C #1F319C #4C1F9C

triadic

#1F319C #9C1F31 #319C1F

tetradic

#1F319C #9C1F70 #9C8A1F #1F9C4C

square

#1F319C #9C1F70 #9C8A1F #1F9C4C

split-complementary

#1F319C #9C4C1F #709C1F

monochromatic

#0B1136 #152169 #1F319C #2941CF #586BDE

Accessibility & contrast

On white

10.62

#1F319C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.98

#1F319C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F319C

10.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F319C	#FFFFFF	#000000	##FFFFFF
##1F319C	1.00	10.62	1.98	10.62
#FFFFFF	10.62	1.00	21.00	1.00
#000000	1.98	21.00	1.00	21.00
##FFFFFF	10.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00459F

Deuteranopia (green-blind)

#00399A

Tritanopia (blue-blind)

#004E62

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #1f319c;
/* rgb */ color: rgb(31, 49, 156);
/* oklch */ color: oklch(37.9% 0.173 268.5);

Tailwind

colors: {
  custom: {
    50: '#7169ba',
    500: '#1f319c',
    950: '#000000',
  },
}

SCSS

$custom: #1f319c;
$custom-light: #7169ba;
$custom-dark: #000000;

JSON

{
  "hex": "#1f319c",
  "rgb": {
    "r": 31,
    "g": 49,
    "b": 156
  },
  "hsl": {
    "h": 231.36,
    "s": 66.845,
    "l": 36.667
  },
  "oklch": {
    "l": 0.3789,
    "c": 0.17331,
    "h": 268.5
  },
  "luminance": 0.04888
}

Semantic roles & 50–950 ramp

primary

#1F319C

secondary

#C1B255

accent

#D13EEA

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#090612

muted

#7B7A81

Preview Lab

Preview with #1F319C

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

Preview Lab → · Contrast checker → · Palette generator →