#1F3385#1F3385

#1F3385 is a dark, vivid blue. Relative luminance 0.044; OKLCH L 36.1% C 0.139 H 268.0°. Best body text is #FFFFFF at 11.23:1 contrast (WCAG AA passes).

Color values

HEX	#1F3385
RGB	rgb(31, 51, 133)
HSL	hsl(228, 62%, 32%)
HSV	hsv(228, 77%, 52%)
CMYK	cmyk(76.7%, 61.7%, 0%, 47.8%)
CIE-LAB	lab(24.80, 23.01, -48.26)
CIE-LCH	lch(24.80, 53.46, 295.49°)
OKLab	oklab(36.05% -0.0048 -0.1394)
OKLCH	oklch(36.05% 0.139 268)
XYZ	xyz(5.9811, 4.3518, 22.7105)
Luminance	0.0435 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3385 #85711F

analogous

#1F6685 #1F3385 #3E1F85

triadic

#1F3385 #851F33 #33851F

tetradic

#1F3385 #851F66 #85711F #1F853E

square

#1F3385 #851F66 #85711F #1F853E

split-complementary

#1F3385 #853E1F #66851F

monochromatic

#080D22 #132053 #1F3385 #2B46B7 #4A65D5

Accessibility & contrast

On white

11.23

#1F3385 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.87

#1F3385 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3385

11.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3385	#FFFFFF	#000000	##FFFFFF
##1F3385	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)

#004088

Deuteranopia (green-blind)

#003683

Tritanopia (blue-blind)

#004857

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #1f3385;
/* rgb */ color: rgb(31, 51, 133);
/* oklch */ color: oklch(36.1% 0.139 268.0);

Tailwind

colors: {
  custom: {
    50: '#6b6aa9',
    500: '#1f3385',
    950: '#000000',
  },
}

SCSS

$custom: #1f3385;
$custom-light: #6b6aa9;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3385",
  "rgb": {
    "r": 31,
    "g": 51,
    "b": 133
  },
  "hsl": {
    "h": 228.235,
    "s": 62.195,
    "l": 32.157
  },
  "oklch": {
    "l": 0.36054,
    "c": 0.13945,
    "h": 268
  },
  "luminance": 0.04352
}

Semantic roles & 50–950 ramp

primary

#1F3385

secondary

#B7A249

accent

#C543E5

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#080610

muted

#7A7A7F

Preview Lab

Preview with #1F3385

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

Preview Lab → · Contrast checker → · Palette generator →