#1F356C#1F356C

#1F356C is a dark, moderate blue. Relative luminance 0.039; OKLCH L 34.4% C 0.100 H 265.2°. Best body text is #FFFFFF at 11.77:1 contrast (WCAG AA passes).

Color values

HEX	#1F356C
RGB	rgb(31, 53, 108)
HSL	hsl(223, 55%, 27%)
HSV	hsv(223, 71%, 42%)
CMYK	cmyk(71.3%, 50.9%, 0%, 57.6%)
CIE-LAB	lab(23.40, 11.62, -34.67)
CIE-LCH	lch(23.40, 36.56, 288.53°)
OKLab	oklab(34.38% -0.0084 -0.0993)
OKLCH	oklch(34.38% 0.1 265.2)
XYZ	xyz(4.5440, 3.9198, 14.7016)
Luminance	0.0392 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F356C #6C561F

analogous

#1F5C6C #1F356C #2F1F6C

triadic

#1F356C #6C1F35 #356C1F

tetradic

#1F356C #6C1F5C #6C561F #1F6C2F

square

#1F356C #6C1F5C #6C561F #1F6C2F

split-complementary

#1F356C #6C2F1F #5C6C1F

monochromatic

#070C18 #111E3C #1F356C #2D4C9C #3E65C8

Accessibility & contrast

On white

11.77

#1F356C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.78

#1F356C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F356C

11.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F356C	#FFFFFF	#000000	##FFFFFF
##1F356C	1.00	11.77	1.78	11.77
#FFFFFF	11.77	1.00	21.00	1.00
#000000	1.78	21.00	1.00	21.00
##FFFFFF	11.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#173B6E

Deuteranopia (green-blind)

#05346B

Tritanopia (blue-blind)

#00424B

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #1f356c;
/* rgb */ color: rgb(31, 53, 108);
/* oklch */ color: oklch(34.4% 0.100 265.2);

Tailwind

colors: {
  custom: {
    50: '#656b96',
    500: '#1f356c',
    950: '#000000',
  },
}

SCSS

$custom: #1f356c;
$custom-light: #656b96;
$custom-dark: #000000;

JSON

{
  "hex": "#1f356c",
  "rgb": {
    "r": 31,
    "g": 53,
    "b": 108
  },
  "hsl": {
    "h": 222.857,
    "s": 55.396,
    "l": 27.255
  },
  "oklch": {
    "l": 0.34376,
    "c": 0.09971,
    "h": 265.2
  },
  "luminance": 0.0392
}

Semantic roles & 50–950 ramp

primary

#1F356C

secondary

#A08747

accent

#B449DF

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06060D

muted

#7A7A7E

Preview Lab

Preview with #1F356C

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

Preview Lab → · Contrast checker → · Palette generator →