#1F397F#1F397F

#1F397F is a dark, vivid blue. Relative luminance 0.048; OKLCH L 36.8% C 0.123 H 265.4°. Best body text is #FFFFFF at 10.77:1 contrast (WCAG AA passes).

Color values

HEX	#1F397F
RGB	rgb(31, 57, 127)
HSL	hsl(224, 61%, 31%)
HSV	hsv(224, 76%, 50%)
CMYK	cmyk(75.6%, 55.1%, 0%, 50.2%)
CIE-LAB	lab(26.01, 16.43, -42.54)
CIE-LCH	lch(26.01, 45.60, 291.12°)
OKLab	oklab(36.81% -0.0099 -0.1225)
OKLCH	oklch(36.81% 0.123 265.4)
XYZ	xyz(5.8576, 4.7492, 20.6825)
Luminance	0.0475 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F397F #7F651F

analogous

#1F697F #1F397F #351F7F

triadic

#1F397F #7F1F39 #397F1F

tetradic

#1F397F #7F1F69 #7F651F #1F7F35

square

#1F397F #7F1F69 #7F651F #1F7F35

split-complementary

#1F397F #7F351F #697F1F

monochromatic

#070D1D #13234E #1F397F #2B4FB0 #466CD2

Accessibility & contrast

On white

10.77

#1F397F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.95

#1F397F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F397F

10.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F397F	#FFFFFF	#000000	##FFFFFF
##1F397F	1.00	10.77	1.95	10.77
#FFFFFF	10.77	1.00	21.00	1.00
#000000	1.95	21.00	1.00	21.00
##FFFFFF	10.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#064281

Deuteranopia (green-blind)

#00397E

Tritanopia (blue-blind)

#004A56

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #1f397f;
/* rgb */ color: rgb(31, 57, 127);
/* oklch */ color: oklch(36.8% 0.123 265.4);

Tailwind

colors: {
  custom: {
    50: '#696ea5',
    500: '#1f397f',
    950: '#000000',
  },
}

SCSS

$custom: #1f397f;
$custom-light: #696ea5;
$custom-dark: #000000;

JSON

{
  "hex": "#1f397f",
  "rgb": {
    "r": 31,
    "g": 57,
    "b": 127
  },
  "hsl": {
    "h": 223.75,
    "s": 60.759,
    "l": 30.98
  },
  "oklch": {
    "l": 0.36805,
    "c": 0.12286,
    "h": 265.4
  },
  "luminance": 0.0475
}

Semantic roles & 50–950 ramp

primary

#1F397F

secondary

#B29548

accent

#B944E4

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #1F397F

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

Preview Lab → · Contrast checker → · Palette generator →