#1F318C#1F318C

#1F318C is a dark, vivid blue. Relative luminance 0.044; OKLCH L 36.3% C 0.152 H 268.7°. Best body text is #FFFFFF at 11.19:1 contrast (WCAG AA passes).

Color values

HEX	#1F318C
RGB	rgb(31, 49, 140)
HSL	hsl(230, 64%, 34%)
HSV	hsv(230, 78%, 55%)
CMYK	cmyk(77.9%, 65%, 0%, 45.1%)
CIE-LAB	lab(24.89, 27.11, -52.48)
CIE-LCH	lch(24.89, 59.06, 297.32°)
OKLab	oklab(36.31% -0.0035 -0.1517)
OKLCH	oklch(36.31% 0.152 268.7)
XYZ	xyz(6.3954, 4.3807, 25.3144)
Luminance	0.0438 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F318C #8C7A1F

analogous

#1F678C #1F318C #431F8C

triadic

#1F318C #8C1F31 #318C1F

tetradic

#1F318C #8C1F67 #8C7A1F #1F8C43

square

#1F318C #8C1F67 #8C7A1F #1F8C43

split-complementary

#1F318C #8C431F #678C1F

monochromatic

#090E28 #141F5A #1F318C #2A43BE #4E64D8

Accessibility & contrast

On white

11.19

#1F318C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.88

#1F318C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F318C

11.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F318C	#FFFFFF	#000000	##FFFFFF
##1F318C	1.00	11.19	1.88	11.19
#FFFFFF	11.19	1.00	21.00	1.00
#000000	1.88	21.00	1.00	21.00
##FFFFFF	11.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00408F

Deuteranopia (green-blind)

#00368A

Tritanopia (blue-blind)

#004959

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #1f318c;
/* rgb */ color: rgb(31, 49, 140);
/* oklch */ color: oklch(36.3% 0.152 268.7);

Tailwind

colors: {
  custom: {
    50: '#6d69ae',
    500: '#1f318c',
    950: '#000000',
  },
}

SCSS

$custom: #1f318c;
$custom-light: #6d69ae;
$custom-dark: #000000;

JSON

{
  "hex": "#1f318c",
  "rgb": {
    "r": 31,
    "g": 49,
    "b": 140
  },
  "hsl": {
    "h": 230.092,
    "s": 63.743,
    "l": 33.529
  },
  "oklch": {
    "l": 0.36313,
    "c": 0.15179,
    "h": 268.7
  },
  "luminance": 0.04381
}

Semantic roles & 50–950 ramp

primary

#1F318C

secondary

#BBA84C

accent

#CB41E7

background

#F7F6FA

surface

#EDEBF4

border

#C8C6CE

text

#080610

muted

#7B7A7F

Preview Lab

Preview with #1F318C

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

Preview Lab → · Contrast checker → · Palette generator →