#1F3183#1F3183

#1F3183 is a dark, vivid blue. Relative luminance 0.041; OKLCH L 35.5% C 0.139 H 268.6°. Best body text is #FFFFFF at 11.50:1 contrast (WCAG AA passes).

Color values

HEX	#1F3183
RGB	rgb(31, 49, 131)
HSL	hsl(229, 62%, 32%)
HSV	hsv(229, 76%, 51%)
CMYK	cmyk(76.3%, 62.6%, 0%, 48.6%)
CIE-LAB	lab(24.08, 23.61, -48.18)
CIE-LCH	lch(24.08, 53.65, 296.10°)
OKLab	oklab(35.47% -0.0033 -0.1391)
OKLCH	oklch(35.47% 0.139 268.6)
XYZ	xyz(5.7587, 4.1260, 21.9612)
Luminance	0.0413 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3183 #83711F

analogous

#1F6383 #1F3183 #3F1F83

triadic

#1F3183 #831F31 #31831F

tetradic

#1F3183 #831F63 #83711F #1F833F

square

#1F3183 #831F63 #83711F #1F833F

split-complementary

#1F3183 #833F1F #63831F

monochromatic

#080C20 #131E52 #1F3183 #2B44B4 #4962D4

Accessibility & contrast

On white

11.50

#1F3183 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.83

#1F3183 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3183

11.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3183	#FFFFFF	#000000	##FFFFFF
##1F3183	1.00	11.50	1.83	11.50
#FFFFFF	11.50	1.00	21.00	1.00
#000000	1.83	21.00	1.00	21.00
##FFFFFF	11.50	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003E86

Deuteranopia (green-blind)

#003581

Tritanopia (blue-blind)

#004655

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #1f3183;
/* rgb */ color: rgb(31, 49, 131);
/* oklch */ color: oklch(35.5% 0.139 268.6);

Tailwind

colors: {
  custom: {
    50: '#6b68a8',
    500: '#1f3183',
    950: '#000000',
  },
}

SCSS

$custom: #1f3183;
$custom-light: #6b68a8;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3183",
  "rgb": {
    "r": 31,
    "g": 49,
    "b": 131
  },
  "hsl": {
    "h": 229.2,
    "s": 61.728,
    "l": 31.765
  },
  "oklch": {
    "l": 0.35466,
    "c": 0.13919,
    "h": 268.6
  },
  "luminance": 0.04127
}

Semantic roles & 50–950 ramp

primary

#1F3183

secondary

#B6A248

accent

#C843E5

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#080610

muted

#7A7A7F

Preview Lab

Preview with #1F3183

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

Preview Lab → · Contrast checker → · Palette generator →