#1F358E#1F358E

#1F358E is a dark, vivid blue. Relative luminance 0.048; OKLCH L 37.3% C 0.150 H 267.6°. Best body text is #FFFFFF at 10.72:1 contrast (WCAG AA passes).

Color values

HEX	#1F358E
RGB	rgb(31, 53, 142)
HSL	hsl(228, 64%, 34%)
HSV	hsv(228, 78%, 56%)
CMYK	cmyk(78.2%, 62.7%, 0%, 44.3%)
CIE-LAB	lab(26.13, 25.16, -51.69)
CIE-LCH	lch(26.13, 57.49, 295.95°)
OKLab	oklab(37.28% -0.0062 -0.1494)
OKLCH	oklch(37.28% 0.15 267.6)
XYZ	xyz(6.7190, 4.7898, 26.1563)
Luminance	0.0479 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F358E #8E781F

analogous

#1F6D8E #1F358E #411F8E

triadic

#1F358E #8E1F35 #358E1F

tetradic

#1F358E #8E1F6D #8E781F #1F8E41

square

#1F358E #8E1F6D #8E781F #1F8E41

split-complementary

#1F358E #8E411F #6D8E1F

monochromatic

#09102A #14225C #1F358E #2A48C0 #4F6AD9

Accessibility & contrast

On white

10.72

#1F358E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.96

#1F358E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F358E

10.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F358E	#FFFFFF	#000000	##FFFFFF
##1F358E	1.00	10.72	1.96	10.72
#FFFFFF	10.72	1.00	21.00	1.00
#000000	1.96	21.00	1.00	21.00
##FFFFFF	10.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004391

Deuteranopia (green-blind)

#00398C

Tritanopia (blue-blind)

#004C5C

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #1f358e;
/* rgb */ color: rgb(31, 53, 142);
/* oklch */ color: oklch(37.3% 0.150 267.6);

Tailwind

colors: {
  custom: {
    50: '#6d6cb0',
    500: '#1f358e',
    950: '#000000',
  },
}

SCSS

$custom: #1f358e;
$custom-light: #6d6cb0;
$custom-dark: #000000;

JSON

{
  "hex": "#1f358e",
  "rgb": {
    "r": 31,
    "g": 53,
    "b": 142
  },
  "hsl": {
    "h": 228.108,
    "s": 64.162,
    "l": 33.922
  },
  "oklch": {
    "l": 0.37282,
    "c": 0.14954,
    "h": 267.6
  },
  "luminance": 0.04791
}

Semantic roles & 50–950 ramp

primary

#1F358E

secondary

#BBA64D

accent

#C641E7

background

#F7F6FA

surface

#EDEBF5

border

#C8C6CF

text

#080611

muted

#7B7A80

Preview Lab

Preview with #1F358E

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

Preview Lab → · Contrast checker → · Palette generator →