#1F4E9A#1F4E9A

#1F4E9A is a dark, vivid blue. Relative luminance 0.081; OKLCH L 43.6% C 0.135 H 259.7°. Best body text is #FFFFFF at 8.03:1 contrast (WCAG AA passes).

Color values

HEX	#1F4E9A
RGB	rgb(31, 78, 154)
HSL	hsl(217, 66%, 36%)
HSV	hsv(217, 80%, 60%)
CMYK	cmyk(79.9%, 49.4%, 0%, 39.6%)
CIE-LAB	lab(34.13, 12.82, -46.04)
CIE-LCH	lch(34.13, 47.79, 285.56°)
OKLab	oklab(43.63% -0.024 -0.1323)
OKLCH	oklch(43.63% 0.135 259.7)
XYZ	xyz(9.1201, 8.0721, 31.6430)
Luminance	0.0807 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4E9A #9A6B1F

analogous

#1F8C9A #1F4E9A #2E1F9A

triadic

#1F4E9A #9A1F4E #4E9A1F

tetradic

#1F4E9A #9A1F8C #9A6B1F #1F9A2E

square

#1F4E9A #9A1F8C #9A6B1F #1F9A2E

split-complementary

#1F4E9A #9A2E1F #8C9A1F

monochromatic

#0A1A34 #153467 #1F4E9A #2968CD #568ADD

Accessibility & contrast

On white

8.03

#1F4E9A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.61

#1F4E9A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4E9A

8.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4E9A	#FFFFFF	#000000	##FFFFFF
##1F4E9A	1.00	8.03	2.61	8.03
#FFFFFF	8.03	1.00	21.00	1.00
#000000	2.61	21.00	1.00	21.00
##FFFFFF	8.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#22569D

Deuteranopia (green-blind)

#004B98

Tritanopia (blue-blind)

#00606C

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #1f4e9a;
/* rgb */ color: rgb(31, 78, 154);
/* oklch */ color: oklch(43.6% 0.135 259.7);

Tailwind

colors: {
  custom: {
    50: '#6f7fb8',
    500: '#1f4e9a',
    950: '#000000',
  },
}

SCSS

$custom: #1f4e9a;
$custom-light: #6f7fb8;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4e9a",
  "rgb": {
    "r": 31,
    "g": 78,
    "b": 154
  },
  "hsl": {
    "h": 217.073,
    "s": 66.486,
    "l": 36.275
  },
  "oklch": {
    "l": 0.43627,
    "c": 0.13451,
    "h": 259.7
  },
  "luminance": 0.08073
}

Semantic roles & 50–950 ramp

primary

#1F4E9A

secondary

#C19754

accent

#A83EE9

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#080A11

muted

#7B7C80

Preview Lab

Preview with #1F4E9A

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

Preview Lab → · Contrast checker → · Palette generator →