#1F358A#1F358A

#1F358A is a dark, vivid blue. Relative luminance 0.047; OKLCH L 36.9% C 0.144 H 267.5°. Best body text is #FFFFFF at 10.86:1 contrast (WCAG AA passes).

Color values

HEX	#1F358A
RGB	rgb(31, 53, 138)
HSL	hsl(228, 63%, 33%)
HSV	hsv(228, 78%, 54%)
CMYK	cmyk(77.5%, 61.6%, 0%, 45.9%)
CIE-LAB	lab(25.78, 23.59, -49.78)
CIE-LCH	lch(25.78, 55.09, 295.35°)
OKLab	oklab(36.92% -0.0062 -0.1438)
OKLCH	oklch(36.92% 0.144 267.5)
XYZ	xyz(6.4240, 4.6718, 24.6030)
Luminance	0.0467 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F358A #8A741F

analogous

#1F6A8A #1F358A #3F1F8A

triadic

#1F358A #8A1F35 #358A1F

tetradic

#1F358A #8A1F6A #8A741F #1F8A3F

square

#1F358A #8A1F6A #8A741F #1F8A3F

split-complementary

#1F358A #8A3F1F #6A8A1F

monochromatic

#090F26 #142258 #1F358A #2A48BC #4C69D7

Accessibility & contrast

On white

10.86

#1F358A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.93

#1F358A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F358A

10.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F358A	#FFFFFF	#000000	##FFFFFF
##1F358A	1.00	10.86	1.93	10.86
#FFFFFF	10.86	1.00	21.00	1.00
#000000	1.93	21.00	1.00	21.00
##FFFFFF	10.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00428D

Deuteranopia (green-blind)

#003888

Tritanopia (blue-blind)

#004B5A

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #1f358a;
/* rgb */ color: rgb(31, 53, 138);
/* oklch */ color: oklch(36.9% 0.144 267.5);

Tailwind

colors: {
  custom: {
    50: '#6c6cad',
    500: '#1f358a',
    950: '#000000',
  },
}

SCSS

$custom: #1f358a;
$custom-light: #6c6cad;
$custom-dark: #000000;

JSON

{
  "hex": "#1f358a",
  "rgb": {
    "r": 31,
    "g": 53,
    "b": 138
  },
  "hsl": {
    "h": 227.664,
    "s": 63.314,
    "l": 33.137
  },
  "oklch": {
    "l": 0.36915,
    "c": 0.14394,
    "h": 267.5
  },
  "luminance": 0.04672
}

Semantic roles & 50–950 ramp

primary

#1F358A

secondary

#BAA34B

accent

#C441E6

background

#F7F6FA

surface

#EDEBF4

border

#C8C6CE

text

#080610

muted

#7B7A7F

Preview Lab

Preview with #1F358A

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

Preview Lab → · Contrast checker → · Palette generator →