#1F356E#1F356E

#1F356E is a dark, moderate blue. Relative luminance 0.040; OKLCH L 34.5% C 0.103 H 265.5°. Best body text is #FFFFFF at 11.71:1 contrast (WCAG AA passes).

Color values

HEX	#1F356E
RGB	rgb(31, 53, 110)
HSL	hsl(223, 56%, 28%)
HSV	hsv(223, 72%, 43%)
CMYK	cmyk(71.8%, 51.8%, 0%, 56.9%)
CIE-LAB	lab(23.55, 12.43, -35.72)
CIE-LCH	lch(23.55, 37.82, 289.18°)
OKLab	oklab(34.53% -0.0081 -0.1025)
OKLCH	oklch(34.53% 0.103 265.5)
XYZ	xyz(4.6517, 3.9628, 15.2686)
Luminance	0.0396 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F356E #6E581F

analogous

#1F5C6E #1F356E #301F6E

triadic

#1F356E #6E1F35 #356E1F

tetradic

#1F356E #6E1F5C #6E581F #1F6E30

square

#1F356E #6E1F5C #6E581F #1F6E30

split-complementary

#1F356E #6E301F #5C6E1F

monochromatic

#070C18 #121E3E #1F356E #2C4C9E #3F65C9

Accessibility & contrast

On white

11.71

#1F356E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.79

#1F356E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F356E

11.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F356E	#FFFFFF	#000000	##FFFFFF
##1F356E	1.00	11.71	1.79	11.71
#FFFFFF	11.71	1.00	21.00	1.00
#000000	1.79	21.00	1.00	21.00
##FFFFFF	11.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#153C70

Deuteranopia (green-blind)

#00356D

Tritanopia (blue-blind)

#00424C

Achromatopsia (no color)

#383838

Design tokens & code

CSS

--color: #1f356e;
/* rgb */ color: rgb(31, 53, 110);
/* oklch */ color: oklch(34.5% 0.103 265.5);

Tailwind

colors: {
  custom: {
    50: '#656b98',
    500: '#1f356e',
    950: '#000000',
  },
}

SCSS

$custom: #1f356e;
$custom-light: #656b98;
$custom-dark: #000000;

JSON

{
  "hex": "#1f356e",
  "rgb": {
    "r": 31,
    "g": 53,
    "b": 110
  },
  "hsl": {
    "h": 223.291,
    "s": 56.028,
    "l": 27.647
  },
  "oklch": {
    "l": 0.34532,
    "c": 0.10278,
    "h": 265.5
  },
  "luminance": 0.03963
}

Semantic roles & 50–950 ramp

primary

#1F356E

secondary

#A28947

accent

#B548DF

background

#F6F6F9

surface

#EBEBF2

border

#C6C6CC

text

#06060E

muted

#7A7A7E

Preview Lab

Preview with #1F356E

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

Preview Lab → · Contrast checker → · Palette generator →