#1F31A9#1F31A9

#1F31A9 is a dark, vivid blue. Relative luminance 0.054; OKLCH L 39.2% C 0.190 H 268.3°. Best body text is #FFFFFF at 10.14:1 contrast (WCAG AA passes).

Color values

HEX	#1F31A9
RGB	rgb(31, 49, 169)
HSL	hsl(232, 69%, 39%)
HSV	hsv(232, 82%, 66%)
CMYK	cmyk(81.7%, 71%, 0%, 33.7%)
CIE-LAB	lab(27.71, 37.97, -65.56)
CIE-LCH	lch(27.71, 75.76, 300.07°)
OKLab	oklab(39.23% -0.0056 -0.19)
OKLCH	oklch(39.23% 0.19 268.3)
XYZ	xyz(8.8223, 5.3515, 38.0964)
Luminance	0.0535 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F31A9 #A9971F

analogous

#1F76A9 #1F31A9 #521FA9

triadic

#1F31A9 #A91F31 #31A91F

tetradic

#1F31A9 #A91F76 #A9971F #1FA952

square

#1F31A9 #A91F76 #A9971F #1FA952

split-complementary

#1F31A9 #A9521F #76A91F

monochromatic

#0C1342 #162275 #1F31A9 #2D43D8 #6071E2

Accessibility & contrast

On white

10.14

#1F31A9 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.07

#1F31A9 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F31A9

10.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F31A9	#FFFFFF	#000000	##FFFFFF
##1F31A9	1.00	10.14	2.07	10.14
#FFFFFF	10.14	1.00	21.00	1.00
#000000	2.07	21.00	1.00	21.00
##FFFFFF	10.14	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0048AD

Deuteranopia (green-blind)

#003BA7

Tritanopia (blue-blind)

#005369

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #1f31a9;
/* rgb */ color: rgb(31, 49, 169);
/* oklch */ color: oklch(39.2% 0.190 268.3);

Tailwind

colors: {
  custom: {
    50: '#7569c4',
    500: '#1f31a9',
    950: '#000000',
  },
}

SCSS

$custom: #1f31a9;
$custom-light: #7569c4;
$custom-dark: #000000;

JSON

{
  "hex": "#1f31a9",
  "rgb": {
    "r": 31,
    "g": 49,
    "b": 169
  },
  "hsl": {
    "h": 232.174,
    "s": 69,
    "l": 39.216
  },
  "oklch": {
    "l": 0.39226,
    "c": 0.19004,
    "h": 268.3
  },
  "luminance": 0.05353
}

Semantic roles & 50–950 ramp

primary

#1F31A9

secondary

#C7B95D

accent

#D53CEC

background

#F7F6FC

surface

#EEEBF8

border

#C9C6D1

text

#0A0613

muted

#7C7A82

Preview Lab

Preview with #1F31A9

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

Preview Lab → · Contrast checker → · Palette generator →