#1F337C#1F337C

#1F337C is a dark, vivid blue. Relative luminance 0.041; OKLCH L 35.3% C 0.126 H 267.7°. Best body text is #FFFFFF at 11.52:1 contrast (WCAG AA passes).

Color values

HEX	#1F337C
RGB	rgb(31, 51, 124)
HSL	hsl(227, 60%, 30%)
HSV	hsv(227, 75%, 49%)
CMYK	cmyk(75%, 58.9%, 0%, 51.4%)
CIE-LAB	lab(24.04, 19.44, -43.84)
CIE-LCH	lch(24.04, 47.96, 293.92°)
OKLab	oklab(35.25% -0.005 -0.1264)
OKLCH	oklch(35.25% 0.126 267.7)
XYZ	xyz(5.3857, 4.1136, 19.5750)
Luminance	0.0411 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F337C #7C681F

analogous

#1F617C #1F337C #3A1F7C

triadic

#1F337C #7C1F33 #337C1F

tetradic

#1F337C #7C1F61 #7C681F #1F7C3A

square

#1F337C #7C1F61 #7C681F #1F7C3A

split-complementary

#1F337C #7C3A1F #617C1F

monochromatic

#070B1A #131F4B #1F337C #2B47AD #4563D0

Accessibility & contrast

On white

11.52

#1F337C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.82

#1F337C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F337C

11.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F337C	#FFFFFF	#000000	##FFFFFF
##1F337C	1.00	11.52	1.82	11.52
#FFFFFF	11.52	1.00	21.00	1.00
#000000	1.82	21.00	1.00	21.00
##FFFFFF	11.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003E7E

Deuteranopia (green-blind)

#00357B

Tritanopia (blue-blind)

#004552

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #1f337c;
/* rgb */ color: rgb(31, 51, 124);
/* oklch */ color: oklch(35.3% 0.126 267.7);

Tailwind

colors: {
  custom: {
    50: '#696aa3',
    500: '#1f337c',
    950: '#000000',
  },
}

SCSS

$custom: #1f337c;
$custom-light: #696aa3;
$custom-dark: #000000;

JSON

{
  "hex": "#1f337c",
  "rgb": {
    "r": 31,
    "g": 51,
    "b": 124
  },
  "hsl": {
    "h": 227.097,
    "s": 60,
    "l": 30.392
  },
  "oklch": {
    "l": 0.3525,
    "c": 0.12647,
    "h": 267.7
  },
  "luminance": 0.04114
}

Semantic roles & 50–950 ramp

primary

#1F337C

secondary

#AF9948

accent

#C145E3

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#07060F

muted

#7A7A7F

Preview Lab

Preview with #1F337C

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

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