#1F358C#1F358C

#1F358C is a dark, vivid blue. Relative luminance 0.047; OKLCH L 37.1% C 0.147 H 267.6°. Best body text is #FFFFFF at 10.79:1 contrast (WCAG AA passes).

Color values

HEX	#1F358C
RGB	rgb(31, 53, 140)
HSL	hsl(228, 64%, 34%)
HSV	hsv(228, 78%, 55%)
CMYK	cmyk(77.9%, 62.1%, 0%, 45.1%)
CIE-LAB	lab(25.95, 24.38, -50.74)
CIE-LCH	lch(25.95, 56.29, 295.66°)
OKLab	oklab(37.1% -0.0062 -0.1466)
OKLCH	oklch(37.1% 0.147 267.6)
XYZ	xyz(6.5702, 4.7302, 25.3726)
Luminance	0.0473 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F358C #8C761F

analogous

#1F6B8C #1F358C #3F1F8C

triadic

#1F358C #8C1F35 #358C1F

tetradic

#1F358C #8C1F6B #8C761F #1F8C3F

square

#1F358C #8C1F6B #8C761F #1F8C3F

split-complementary

#1F358C #8C3F1F #6B8C1F

monochromatic

#090F28 #14225A #1F358C #2A48BE #4E6AD8

Accessibility & contrast

On white

10.79

#1F358C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.95

#1F358C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F358C

10.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F358C	#FFFFFF	#000000	##FFFFFF
##1F358C	1.00	10.79	1.95	10.79
#FFFFFF	10.79	1.00	21.00	1.00
#000000	1.95	21.00	1.00	21.00
##FFFFFF	10.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00438F

Deuteranopia (green-blind)

#00388A

Tritanopia (blue-blind)

#004B5B

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #1f358c;
/* rgb */ color: rgb(31, 53, 140);
/* oklch */ color: oklch(37.1% 0.147 267.6);

Tailwind

colors: {
  custom: {
    50: '#6d6cae',
    500: '#1f358c',
    950: '#000000',
  },
}

SCSS

$custom: #1f358c;
$custom-light: #6d6cae;
$custom-dark: #000000;

JSON

{
  "hex": "#1f358c",
  "rgb": {
    "r": 31,
    "g": 53,
    "b": 140
  },
  "hsl": {
    "h": 227.89,
    "s": 63.743,
    "l": 33.529
  },
  "oklch": {
    "l": 0.37098,
    "c": 0.14675,
    "h": 267.6
  },
  "luminance": 0.04731
}

Semantic roles & 50–950 ramp

primary

#1F358C

secondary

#BBA44C

accent

#C541E7

background

#F7F6FA

surface

#EDEBF4

border

#C8C6CE

text

#080610

muted

#7B7A7F

Preview Lab

Preview with #1F358C

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

Preview Lab → · Contrast checker → · Palette generator →