#1F319E#1F319E

#1F319E is a dark, vivid blue. Relative luminance 0.050; OKLCH L 38.1% C 0.176 H 268.5°. Best body text is #FFFFFF at 10.55:1 contrast (WCAG AA passes).

Color values

HEX	#1F319E
RGB	rgb(31, 49, 158)
HSL	hsl(231, 67%, 37%)
HSV	hsv(231, 80%, 62%)
CMYK	cmyk(80.4%, 69%, 0%, 38%)
CIE-LAB	lab(26.61, 33.93, -60.72)
CIE-LCH	lch(26.61, 69.56, 299.19°)
OKLab	oklab(38.09% -0.0046 -0.1759)
OKLCH	oklch(38.09% 0.176 268.5)
XYZ	xyz(7.8328, 4.9557, 32.8848)
Luminance	0.0496 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F319E #9E8C1F

analogous

#1F719E #1F319E #4D1F9E

triadic

#1F319E #9E1F31 #319E1F

tetradic

#1F319E #9E1F71 #9E8C1F #1F9E4D

square

#1F319E #9E1F71 #9E8C1F #1F9E4D

split-complementary

#1F319E #9E4D1F #719E1F

monochromatic

#0B1138 #15216B #1F319E #2941D1 #596CDE

Accessibility & contrast

On white

10.55

#1F319E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.99

#1F319E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F319E

10.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F319E	#FFFFFF	#000000	##FFFFFF
##1F319E	1.00	10.55	1.99	10.55
#FFFFFF	10.55	1.00	21.00	1.00
#000000	1.99	21.00	1.00	21.00
##FFFFFF	10.55	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0045A1

Deuteranopia (green-blind)

#00399C

Tritanopia (blue-blind)

#004F63

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #1f319e;
/* rgb */ color: rgb(31, 49, 158);
/* oklch */ color: oklch(38.1% 0.176 268.5);

Tailwind

colors: {
  custom: {
    50: '#7269bc',
    500: '#1f319e',
    950: '#000000',
  },
}

SCSS

$custom: #1f319e;
$custom-light: #7269bc;
$custom-dark: #000000;

JSON

{
  "hex": "#1f319e",
  "rgb": {
    "r": 31,
    "g": 49,
    "b": 158
  },
  "hsl": {
    "h": 231.496,
    "s": 67.196,
    "l": 37.059
  },
  "oklch": {
    "l": 0.38093,
    "c": 0.17592,
    "h": 268.5
  },
  "luminance": 0.04957
}

Semantic roles & 50–950 ramp

primary

#1F319E

secondary

#C2B356

accent

#D23EEA

background

#F7F6FB

surface

#EEEBF6

border

#C9C6D0

text

#090612

muted

#7B7A81

Preview Lab

Preview with #1F319E

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

Preview Lab → · Contrast checker → · Palette generator →