#1F368B#1F368B

#1F368B is a dark, vivid blue. Relative luminance 0.048; OKLCH L 37.2% C 0.144 H 267.3°. Best body text is #FFFFFF at 10.72:1 contrast (WCAG AA passes).

Color values

HEX	#1F368B
RGB	rgb(31, 54, 139)
HSL	hsl(227, 64%, 33%)
HSV	hsv(227, 78%, 55%)
CMYK	cmyk(77.7%, 61.2%, 0%, 45.5%)
CIE-LAB	lab(26.14, 23.29, -49.82)
CIE-LCH	lch(26.14, 55.00, 295.06°)
OKLab	oklab(37.21% -0.0069 -0.1439)
OKLCH	oklch(37.21% 0.144 267.3)
XYZ	xyz(6.5428, 4.7930, 25.0014)
Luminance	0.0479 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F368B #8B741F

analogous

#1F6C8B #1F368B #3E1F8B

triadic

#1F368B #8B1F36 #368B1F

tetradic

#1F368B #8B1F6C #8B741F #1F8B3E

square

#1F368B #8B1F6C #8B741F #1F8B3E

split-complementary

#1F368B #8B3E1F #6C8B1F

monochromatic

#090F27 #142359 #1F368B #2A49BD #4D6BD7

Accessibility & contrast

On white

10.72

#1F368B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.96

#1F368B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F368B

10.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F368B	#FFFFFF	#000000	##FFFFFF
##1F368B	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)

#00438E

Deuteranopia (green-blind)

#003989

Tritanopia (blue-blind)

#004C5B

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #1f368b;
/* rgb */ color: rgb(31, 54, 139);
/* oklch */ color: oklch(37.2% 0.144 267.3);

Tailwind

colors: {
  custom: {
    50: '#6c6cae',
    500: '#1f368b',
    950: '#000000',
  },
}

SCSS

$custom: #1f368b;
$custom-light: #6c6cae;
$custom-dark: #000000;

JSON

{
  "hex": "#1f368b",
  "rgb": {
    "r": 31,
    "g": 54,
    "b": 139
  },
  "hsl": {
    "h": 227.222,
    "s": 63.529,
    "l": 33.333
  },
  "oklch": {
    "l": 0.37208,
    "c": 0.14406,
    "h": 267.3
  },
  "luminance": 0.04794
}

Semantic roles & 50–950 ramp

primary

#1F368B

secondary

#BAA34C

accent

#C341E7

background

#F7F6FA

surface

#EDEBF4

border

#C8C6CE

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #1F368B

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

Preview Lab → · Contrast checker → · Palette generator →