#1F347F#1F347F

#1F347F is a dark, vivid blue. Relative luminance 0.043; OKLCH L 35.7% C 0.130 H 267.5°. Best body text is #FFFFFF at 11.31:1 contrast (WCAG AA passes).

Color values

HEX	#1F347F
RGB	rgb(31, 52, 127)
HSL	hsl(227, 61%, 31%)
HSV	hsv(227, 76%, 50%)
CMYK	cmyk(75.6%, 59.1%, 0%, 50.2%)
CIE-LAB	lab(24.57, 19.94, -44.87)
CIE-LCH	lch(24.57, 49.10, 293.96°)
OKLab	oklab(35.72% -0.0057 -0.1294)
OKLCH	oklch(35.72% 0.13 267.5)
XYZ	xyz(5.6225, 4.2790, 20.6042)
Luminance	0.0428 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F347F #7F6A1F

analogous

#1F647F #1F347F #3A1F7F

triadic

#1F347F #7F1F34 #347F1F

tetradic

#1F347F #7F1F64 #7F6A1F #1F7F3A

square

#1F347F #7F1F64 #7F6A1F #1F7F3A

split-complementary

#1F347F #7F3A1F #647F1F

monochromatic

#070C1D #13204E #1F347F #2B48B0 #4665D2

Accessibility & contrast

On white

11.31

#1F347F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.86

#1F347F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F347F

11.31:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F347F	#FFFFFF	#000000	##FFFFFF
##1F347F	1.00	11.31	1.86	11.31
#FFFFFF	11.31	1.00	21.00	1.00
#000000	1.86	21.00	1.00	21.00
##FFFFFF	11.31	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003F82

Deuteranopia (green-blind)

#00367E

Tritanopia (blue-blind)

#004754

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #1f347f;
/* rgb */ color: rgb(31, 52, 127);
/* oklch */ color: oklch(35.7% 0.130 267.5);

Tailwind

colors: {
  custom: {
    50: '#696ba5',
    500: '#1f347f',
    950: '#000000',
  },
}

SCSS

$custom: #1f347f;
$custom-light: #696ba5;
$custom-dark: #000000;

JSON

{
  "hex": "#1f347f",
  "rgb": {
    "r": 31,
    "g": 52,
    "b": 127
  },
  "hsl": {
    "h": 226.875,
    "s": 60.759,
    "l": 30.98
  },
  "oklch": {
    "l": 0.35724,
    "c": 0.12952,
    "h": 267.5
  },
  "luminance": 0.0428
}

Semantic roles & 50–950 ramp

primary

#1F347F

secondary

#B29B48

accent

#C144E4

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#07060F

muted

#7A7A7F

Preview Lab

Preview with #1F347F

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

Preview Lab → · Contrast checker → · Palette generator →