#1F3288#1F3288

#1F3288 is a dark, vivid blue. Relative luminance 0.043; OKLCH L 36.1% C 0.145 H 268.4°. Best body text is #FFFFFF at 11.23:1 contrast (WCAG AA passes).

Color values

HEX	#1F3288
RGB	rgb(31, 50, 136)
HSL	hsl(229, 63%, 33%)
HSV	hsv(229, 77%, 53%)
CMYK	cmyk(77.2%, 63.2%, 0%, 46.7%)
CIE-LAB	lab(24.79, 24.87, -50.15)
CIE-LCH	lch(24.79, 55.98, 296.38°)
OKLab	oklab(36.13% -0.0041 -0.1449)
OKLCH	oklch(36.13% 0.145 268.4)
XYZ	xyz(6.1481, 4.3494, 23.8033)
Luminance	0.0435 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3288 #88751F

analogous

#1F6688 #1F3288 #411F88

triadic

#1F3288 #881F32 #32881F

tetradic

#1F3288 #881F66 #88751F #1F8841

square

#1F3288 #881F66 #88751F #1F8841

split-complementary

#1F3288 #88411F #66881F

monochromatic

#080D24 #142056 #1F3288 #2A44BA #4B64D6

Accessibility & contrast

On white

11.23

#1F3288 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.87

#1F3288 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3288

11.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3288	#FFFFFF	#000000	##FFFFFF
##1F3288	1.00	11.23	1.87	11.23
#FFFFFF	11.23	1.00	21.00	1.00
#000000	1.87	21.00	1.00	21.00
##FFFFFF	11.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00408B

Deuteranopia (green-blind)

#003686

Tritanopia (blue-blind)

#004858

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #1f3288;
/* rgb */ color: rgb(31, 50, 136);
/* oklch */ color: oklch(36.1% 0.145 268.4);

Tailwind

colors: {
  custom: {
    50: '#6c69ab',
    500: '#1f3288',
    950: '#000000',
  },
}

SCSS

$custom: #1f3288;
$custom-light: #6c69ab;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3288",
  "rgb": {
    "r": 31,
    "g": 50,
    "b": 136
  },
  "hsl": {
    "h": 229.143,
    "s": 62.874,
    "l": 32.745
  },
  "oklch": {
    "l": 0.3613,
    "c": 0.14497,
    "h": 268.4
  },
  "luminance": 0.0435
}

Semantic roles & 50–950 ramp

primary

#1F3288

secondary

#B9A54A

accent

#C842E6

background

#F7F6FA

surface

#EDEBF4

border

#C8C6CE

text

#080610

muted

#7B7A7F

Preview Lab

Preview with #1F3288

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

Preview Lab → · Contrast checker → · Palette generator →