#1F397E#1F397E

#1F397E is a dark, vivid blue. Relative luminance 0.047; OKLCH L 36.7% C 0.121 H 265.3°. Best body text is #FFFFFF at 10.80:1 contrast (WCAG AA passes).

Color values

HEX	#1F397E
RGB	rgb(31, 57, 126)
HSL	hsl(224, 61%, 31%)
HSV	hsv(224, 75%, 49%)
CMYK	cmyk(75.4%, 54.8%, 0%, 50.6%)
CIE-LAB	lab(25.93, 16.03, -42.04)
CIE-LCH	lch(25.93, 44.99, 290.87°)
OKLab	oklab(36.72% -0.01 -0.121)
OKLCH	oklch(36.72% 0.121 265.3)
XYZ	xyz(5.7928, 4.7233, 20.3410)
Luminance	0.0472 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F397E #7E641F

analogous

#1F687E #1F397E #341F7E

triadic

#1F397E #7E1F39 #397E1F

tetradic

#1F397E #7E1F68 #7E641F #1F7E34

square

#1F397E #7E1F68 #7E641F #1F7E34

split-complementary

#1F397E #7E341F #687E1F

monochromatic

#070D1C #13234D #1F397E #2B4FAF #466CD1

Accessibility & contrast

On white

10.80

#1F397E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.94

#1F397E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F397E

10.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F397E	#FFFFFF	#000000	##FFFFFF
##1F397E	1.00	10.80	1.94	10.80
#FFFFFF	10.80	1.00	21.00	1.00
#000000	1.94	21.00	1.00	21.00
##FFFFFF	10.80	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#084280

Deuteranopia (green-blind)

#00397D

Tritanopia (blue-blind)

#004A55

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #1f397e;
/* rgb */ color: rgb(31, 57, 126);
/* oklch */ color: oklch(36.7% 0.121 265.3);

Tailwind

colors: {
  custom: {
    50: '#696ea4',
    500: '#1f397e',
    950: '#000000',
  },
}

SCSS

$custom: #1f397e;
$custom-light: #696ea4;
$custom-dark: #000000;

JSON

{
  "hex": "#1f397e",
  "rgb": {
    "r": 31,
    "g": 57,
    "b": 126
  },
  "hsl": {
    "h": 223.579,
    "s": 60.51,
    "l": 30.784
  },
  "oklch": {
    "l": 0.36723,
    "c": 0.12138,
    "h": 265.3
  },
  "luminance": 0.04724
}

Semantic roles & 50–950 ramp

primary

#1F397E

secondary

#B19448

accent

#B844E4

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #1F397E

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

Preview Lab → · Contrast checker → · Palette generator →