#1F4D9D#1F4D9D

#1F4D9D is a dark, vivid blue. Relative luminance 0.080; OKLCH L 43.6% C 0.140 H 260.6°. Best body text is #FFFFFF at 8.06:1 contrast (WCAG AA passes).

Color values

HEX	#1F4D9D
RGB	rgb(31, 77, 157)
HSL	hsl(218, 67%, 37%)
HSV	hsv(218, 80%, 62%)
CMYK	cmyk(80.3%, 51%, 0%, 38.4%)
CIE-LAB	lab(34.05, 14.69, -47.98)
CIE-LCH	lch(34.05, 50.18, 287.02°)
OKLab	oklab(43.63% -0.0228 -0.1381)
OKLCH	oklch(43.63% 0.14 260.6)
XYZ	xyz(9.3025, 8.0323, 32.9519)
Luminance	0.0803 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4D9D #9D6F1F

analogous

#1F8C9D #1F4D9D #301F9D

triadic

#1F4D9D #9D1F4D #4D9D1F

tetradic

#1F4D9D #9D1F8C #9D6F1F #1F9D30

square

#1F4D9D #9D1F8C #9D6F1F #1F9D30

split-complementary

#1F4D9D #9D301F #8C9D1F

monochromatic

#0B1B37 #15346A #1F4D9D #2966D0 #5889DE

Accessibility & contrast

On white

8.06

#1F4D9D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.61

#1F4D9D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4D9D

8.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4D9D	#FFFFFF	#000000	##FFFFFF
##1F4D9D	1.00	8.06	2.61	8.06
#FFFFFF	8.06	1.00	21.00	1.00
#000000	2.61	21.00	1.00	21.00
##FFFFFF	8.06	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1B56A0

Deuteranopia (green-blind)

#004B9B

Tritanopia (blue-blind)

#00606D

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #1f4d9d;
/* rgb */ color: rgb(31, 77, 157);
/* oklch */ color: oklch(43.6% 0.140 260.6);

Tailwind

colors: {
  custom: {
    50: '#6f7eba',
    500: '#1f4d9d',
    950: '#000000',
  },
}

SCSS

$custom: #1f4d9d;
$custom-light: #6f7eba;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4d9d",
  "rgb": {
    "r": 31,
    "g": 77,
    "b": 157
  },
  "hsl": {
    "h": 218.095,
    "s": 67.021,
    "l": 36.863
  },
  "oklch": {
    "l": 0.43631,
    "c": 0.13996,
    "h": 260.6
  },
  "luminance": 0.08033
}

Semantic roles & 50–950 ramp

primary

#1F4D9D

secondary

#C29A56

accent

#AB3EEA

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#090912

muted

#7B7B81

Preview Lab

Preview with #1F4D9D

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

Preview Lab → · Contrast checker → · Palette generator →