#1F4D9A#1F4D9A

#1F4D9A is a dark, vivid blue. Relative luminance 0.079; OKLCH L 43.4% C 0.136 H 260.2°. Best body text is #FFFFFF at 8.12:1 contrast (WCAG AA passes).

Color values

HEX	#1F4D9A
RGB	rgb(31, 77, 154)
HSL	hsl(218, 66%, 36%)
HSV	hsv(218, 80%, 60%)
CMYK	cmyk(79.9%, 50%, 0%, 39.6%)
CIE-LAB	lab(33.84, 13.49, -46.51)
CIE-LCH	lch(33.84, 48.43, 286.18°)
OKLab	oklab(43.4% -0.0232 -0.1338)
OKLCH	oklch(43.4% 0.136 260.2)
XYZ	xyz(9.0496, 7.9311, 31.6195)
Luminance	0.0793 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4D9A #9A6C1F

analogous

#1F8B9A #1F4D9A #2F1F9A

triadic

#1F4D9A #9A1F4D #4D9A1F

tetradic

#1F4D9A #9A1F8B #9A6C1F #1F9A2F

square

#1F4D9A #9A1F8B #9A6C1F #1F9A2F

split-complementary

#1F4D9A #9A2F1F #8B9A1F

monochromatic

#0A1A34 #153467 #1F4D9A #2966CD #5689DD

Accessibility & contrast

On white

8.12

#1F4D9A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.59

#1F4D9A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4D9A

8.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4D9A	#FFFFFF	#000000	##FFFFFF
##1F4D9A	1.00	8.12	2.59	8.12
#FFFFFF	8.12	1.00	21.00	1.00
#000000	2.59	21.00	1.00	21.00
##FFFFFF	8.12	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1F569D

Deuteranopia (green-blind)

#004A98

Tritanopia (blue-blind)

#00606C

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #1f4d9a;
/* rgb */ color: rgb(31, 77, 154);
/* oklch */ color: oklch(43.4% 0.136 260.2);

Tailwind

colors: {
  custom: {
    50: '#6f7eb8',
    500: '#1f4d9a',
    950: '#000000',
  },
}

SCSS

$custom: #1f4d9a;
$custom-light: #6f7eb8;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4d9a",
  "rgb": {
    "r": 31,
    "g": 77,
    "b": 154
  },
  "hsl": {
    "h": 217.561,
    "s": 66.486,
    "l": 36.275
  },
  "oklch": {
    "l": 0.43402,
    "c": 0.13576,
    "h": 260.2
  },
  "luminance": 0.07932
}

Semantic roles & 50–950 ramp

primary

#1F4D9A

secondary

#C19854

accent

#A93EE9

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#080911

muted

#7B7B80

Preview Lab

Preview with #1F4D9A

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

Preview Lab → · Contrast checker → · Palette generator →