#1F355A#1F355A

#1F355A is a dark, moderate blue. Relative luminance 0.036; OKLCH L 33.1% C 0.072 H 260.2°. Best body text is #FFFFFF at 12.24:1 contrast (WCAG AA passes).

Color values

HEX	#1F355A
RGB	rgb(31, 53, 90)
HSL	hsl(218, 49%, 24%)
HSV	hsv(218, 66%, 35%)
CMYK	cmyk(65.6%, 41.1%, 0%, 64.7%)
CIE-LAB	lab(22.21, 4.48, -24.85)
CIE-LCH	lch(22.21, 25.25, 280.21°)
OKLab	oklab(33.08% -0.0121 -0.0705)
OKLCH	oklch(33.08% 0.072 260.2)
XYZ	xyz(3.6830, 3.5754, 10.1669)
Luminance	0.0358 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F355A #5A441F

analogous

#1F525A #1F355A #261F5A

triadic

#1F355A #5A1F35 #355A1F

tetradic

#1F355A #5A1F52 #5A441F #1F5A26

square

#1F355A #5A1F52 #5A441F #1F5A26

split-complementary

#1F355A #5A261F #525A1F

monochromatic

#080D17 #0F1A2C #1F355A #2F5088 #3E6BB5

Accessibility & contrast

On white

12.24

#1F355A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.72

#1F355A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F355A

12.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F355A	#FFFFFF	#000000	##FFFFFF
##1F355A	1.00	12.24	1.72	12.24
#FFFFFF	12.24	1.00	21.00	1.00
#000000	1.72	21.00	1.00	21.00
##FFFFFF	12.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#25385B

Deuteranopia (green-blind)

#1D3359

Tritanopia (blue-blind)

#003D43

Achromatopsia (no color)

#353535

Design tokens & code

CSS

--color: #1f355a;
/* rgb */ color: rgb(31, 53, 90);
/* oklch */ color: oklch(33.1% 0.072 260.2);

Tailwind

colors: {
  custom: {
    50: '#616b89',
    500: '#1f355a',
    950: '#000000',
  },
}

SCSS

$custom: #1f355a;
$custom-light: #616b89;
$custom-dark: #000000;

JSON

{
  "hex": "#1f355a",
  "rgb": {
    "r": 31,
    "g": 53,
    "b": 90
  },
  "hsl": {
    "h": 217.627,
    "s": 48.76,
    "l": 23.725
  },
  "oklch": {
    "l": 0.33076,
    "c": 0.07157,
    "h": 260.2
  },
  "luminance": 0.03576
}

Semantic roles & 50–950 ramp

primary

#1F355A

secondary

#8F7446

accent

#A54FD8

background

#F5F6F8

surface

#EAEBF0

border

#C6C6CB

text

#05060B

muted

#797A7C

Preview Lab

Preview with #1F355A

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

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