#1F347B#1F347B

#1F347B is a dark, vivid blue. Relative luminance 0.042; OKLCH L 35.4% C 0.124 H 267.3°. Best body text is #FFFFFF at 11.44:1 contrast (WCAG AA passes).

Color values

HEX	#1F347B
RGB	rgb(31, 52, 123)
HSL	hsl(226, 60%, 30%)
HSV	hsv(226, 75%, 48%)
CMYK	cmyk(74.8%, 57.7%, 0%, 51.8%)
CIE-LAB	lab(24.25, 18.34, -42.87)
CIE-LCH	lch(24.25, 46.63, 293.16°)
OKLab	oklab(35.38% -0.0059 -0.1235)
OKLCH	oklch(35.38% 0.124 267.3)
XYZ	xyz(5.3670, 4.1768, 19.2584)
Luminance	0.0418 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F347B #7B661F

analogous

#1F627B #1F347B #381F7B

triadic

#1F347B #7B1F34 #347B1F

tetradic

#1F347B #7B1F62 #7B661F #1F7B38

square

#1F347B #7B1F62 #7B661F #1F7B38

split-complementary

#1F347B #7B381F #627B1F

monochromatic

#060B19 #131F4A #1F347B #2B49AC #4464D0

Accessibility & contrast

On white

11.44

#1F347B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.84

#1F347B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F347B

11.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F347B	#FFFFFF	#000000	##FFFFFF
##1F347B	1.00	11.44	1.84	11.44
#FFFFFF	11.44	1.00	21.00	1.00
#000000	1.84	21.00	1.00	21.00
##FFFFFF	11.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003E7D

Deuteranopia (green-blind)

#00367A

Tritanopia (blue-blind)

#004552

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #1f347b;
/* rgb */ color: rgb(31, 52, 123);
/* oklch */ color: oklch(35.4% 0.124 267.3);

Tailwind

colors: {
  custom: {
    50: '#686ba2',
    500: '#1f347b',
    950: '#000000',
  },
}

SCSS

$custom: #1f347b;
$custom-light: #686ba2;
$custom-dark: #000000;

JSON

{
  "hex": "#1f347b",
  "rgb": {
    "r": 31,
    "g": 52,
    "b": 123
  },
  "hsl": {
    "h": 226.304,
    "s": 59.74,
    "l": 30.196
  },
  "oklch": {
    "l": 0.35377,
    "c": 0.12366,
    "h": 267.3
  },
  "luminance": 0.04177
}

Semantic roles & 50–950 ramp

primary

#1F347B

secondary

#AE9748

accent

#BF45E3

background

#F6F6FA

surface

#EBEBF3

border

#C6C6CD

text

#07060F

muted

#7A7A7F

Preview Lab

Preview with #1F347B

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

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