#1F3A85#1F3A85

#1F3A85 is a dark, vivid blue. Relative luminance 0.050; OKLCH L 37.5% C 0.130 H 265.5°. Best body text is #FFFFFF at 10.49:1 contrast (WCAG AA passes).

Color values

HEX	#1F3A85
RGB	rgb(31, 58, 133)
HSL	hsl(224, 62%, 32%)
HSV	hsv(224, 77%, 52%)
CMYK	cmyk(76.7%, 56.4%, 0%, 47.8%)
CIE-LAB	lab(26.76, 18.13, -45.07)
CIE-LCH	lch(26.76, 48.58, 291.92°)
OKLab	oklab(37.52% -0.0102 -0.1299)
OKLCH	oklch(37.52% 0.13 265.5)
XYZ	xyz(6.3103, 5.0102, 22.8202)
Luminance	0.0501 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3A85 #856A1F

analogous

#1F6D85 #1F3A85 #371F85

triadic

#1F3A85 #851F3A #3A851F

tetradic

#1F3A85 #851F6D #856A1F #1F8537

square

#1F3A85 #851F6D #856A1F #1F8537

split-complementary

#1F3A85 #85371F #6D851F

monochromatic

#080F22 #132453 #1F3A85 #2B50B7 #4A6ED5

Accessibility & contrast

On white

10.49

#1F3A85 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.00

#1F3A85 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3A85

10.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3A85	#FFFFFF	#000000	##FFFFFF
##1F3A85	1.00	10.49	2.00	10.49
#FFFFFF	10.49	1.00	21.00	1.00
#000000	2.00	21.00	1.00	21.00
##FFFFFF	10.49	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004488

Deuteranopia (green-blind)

#003B84

Tritanopia (blue-blind)

#004C59

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #1f3a85;
/* rgb */ color: rgb(31, 58, 133);
/* oklch */ color: oklch(37.5% 0.130 265.5);

Tailwind

colors: {
  custom: {
    50: '#6a6fa9',
    500: '#1f3a85',
    950: '#000000',
  },
}

SCSS

$custom: #1f3a85;
$custom-light: #6a6fa9;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3a85",
  "rgb": {
    "r": 31,
    "g": 58,
    "b": 133
  },
  "hsl": {
    "h": 224.118,
    "s": 62.195,
    "l": 32.157
  },
  "oklch": {
    "l": 0.37524,
    "c": 0.13028,
    "h": 265.5
  },
  "luminance": 0.05011
}

Semantic roles & 50–950 ramp

primary

#1F3A85

secondary

#B79A49

accent

#BA43E5

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070710

muted

#7A7A7F

Preview Lab

Preview with #1F3A85

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

Preview Lab → · Contrast checker → · Palette generator →