#1F368A#1F368A

#1F368A is a dark, vivid blue. Relative luminance 0.048; OKLCH L 37.1% C 0.143 H 267.2°. Best body text is #FFFFFF at 10.75:1 contrast (WCAG AA passes).

Color values

HEX	#1F368A
RGB	rgb(31, 54, 138)
HSL	hsl(227, 63%, 33%)
HSV	hsv(227, 78%, 54%)
CMYK	cmyk(77.5%, 60.9%, 0%, 45.9%)
CIE-LAB	lab(26.05, 22.90, -49.34)
CIE-LCH	lch(26.05, 54.40, 294.90°)
OKLab	oklab(37.12% -0.0069 -0.1425)
OKLCH	oklch(37.12% 0.143 267.2)
XYZ	xyz(6.4701, 4.7639, 24.6184)
Luminance	0.0476 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F368A #8A731F

analogous

#1F6B8A #1F368A #3D1F8A

triadic

#1F368A #8A1F36 #368A1F

tetradic

#1F368A #8A1F6B #8A731F #1F8A3D

square

#1F368A #8A1F6B #8A731F #1F8A3D

split-complementary

#1F368A #8A3D1F #6B8A1F

monochromatic

#090F26 #142258 #1F368A #2A4ABC #4C6AD7

Accessibility & contrast

On white

10.75

#1F368A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.95

#1F368A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F368A

10.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F368A	#FFFFFF	#000000	##FFFFFF
##1F368A	1.00	10.75	1.95	10.75
#FFFFFF	10.75	1.00	21.00	1.00
#000000	1.95	21.00	1.00	21.00
##FFFFFF	10.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00438D

Deuteranopia (green-blind)

#003988

Tritanopia (blue-blind)

#004B5A

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #1f368a;
/* rgb */ color: rgb(31, 54, 138);
/* oklch */ color: oklch(37.1% 0.143 267.2);

Tailwind

colors: {
  custom: {
    50: '#6c6cad',
    500: '#1f368a',
    950: '#000000',
  },
}

SCSS

$custom: #1f368a;
$custom-light: #6c6cad;
$custom-dark: #000000;

JSON

{
  "hex": "#1f368a",
  "rgb": {
    "r": 31,
    "g": 54,
    "b": 138
  },
  "hsl": {
    "h": 227.103,
    "s": 63.314,
    "l": 33.137
  },
  "oklch": {
    "l": 0.37118,
    "c": 0.14266,
    "h": 267.2
  },
  "luminance": 0.04765
}

Semantic roles & 50–950 ramp

primary

#1F368A

secondary

#BAA24B

accent

#C341E6

background

#F7F6FA

surface

#EDEBF4

border

#C8C6CE

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #1F368A

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

Preview Lab → · Contrast checker → · Palette generator →