#1F397C#1F397C

#1F397C is a dark, moderate blue. Relative luminance 0.047; OKLCH L 36.6% C 0.118 H 265.1°. Best body text is #FFFFFF at 10.85:1 contrast (WCAG AA passes).

Color values

HEX	#1F397C
RGB	rgb(31, 57, 124)
HSL	hsl(223, 60%, 30%)
HSV	hsv(223, 75%, 49%)
CMYK	cmyk(75%, 54%, 0%, 51.4%)
CIE-LAB	lab(25.78, 15.22, -41.02)
CIE-LCH	lch(25.78, 43.76, 290.36°)
OKLab	oklab(36.56% -0.0102 -0.118)
OKLCH	oklch(36.56% 0.118 265.1)
XYZ	xyz(5.6650, 4.6722, 19.6681)
Luminance	0.0467 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F397C #7C621F

analogous

#1F677C #1F397C #341F7C

triadic

#1F397C #7C1F39 #397C1F

tetradic

#1F397C #7C1F67 #7C621F #1F7C34

square

#1F397C #7C1F67 #7C621F #1F7C34

split-complementary

#1F397C #7C341F #677C1F

monochromatic

#070C1A #13224B #1F397C #2B50AD #456CD0

Accessibility & contrast

On white

10.85

#1F397C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.93

#1F397C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F397C

10.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F397C	#FFFFFF	#000000	##FFFFFF
##1F397C	1.00	10.85	1.93	10.85
#FFFFFF	10.85	1.00	21.00	1.00
#000000	1.93	21.00	1.00	21.00
##FFFFFF	10.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0D427E

Deuteranopia (green-blind)

#00397B

Tritanopia (blue-blind)

#004954

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #1f397c;
/* rgb */ color: rgb(31, 57, 124);
/* oklch */ color: oklch(36.6% 0.118 265.1);

Tailwind

colors: {
  custom: {
    50: '#686ea2',
    500: '#1f397c',
    950: '#000000',
  },
}

SCSS

$custom: #1f397c;
$custom-light: #686ea2;
$custom-dark: #000000;

JSON

{
  "hex": "#1f397c",
  "rgb": {
    "r": 31,
    "g": 57,
    "b": 124
  },
  "hsl": {
    "h": 223.226,
    "s": 60,
    "l": 30.392
  },
  "oklch": {
    "l": 0.3656,
    "c": 0.11843,
    "h": 265.1
  },
  "luminance": 0.04673
}

Semantic roles & 50–950 ramp

primary

#1F397C

secondary

#AF9248

accent

#B745E3

background

#F6F6FA

surface

#EBEBF4

border

#C6C6CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #1F397C

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

Preview Lab → · Contrast checker → · Palette generator →