#1F4B8E#1F4B8E

#1F4B8E is a dark, vivid blue. Relative luminance 0.073; OKLCH L 42.1% C 0.121 H 258.8°. Best body text is #FFFFFF at 8.55:1 contrast (WCAG AA passes).

Color values

HEX	#1F4B8E
RGB	rgb(31, 75, 142)
HSL	hsl(216, 64%, 34%)
HSV	hsv(216, 78%, 56%)
CMYK	cmyk(78.2%, 47.2%, 0%, 44.3%)
CIE-LAB	lab(32.43, 10.04, -41.49)
CIE-LCH	lch(32.43, 42.69, 283.61°)
OKLab	oklab(42.05% -0.0235 -0.119)
OKLCH	oklch(42.05% 0.121 258.8)
XYZ	xyz(7.9619, 7.2755, 26.5706)
Luminance	0.0728 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4B8E #8E621F

analogous

#1F838E #1F4B8E #2B1F8E

triadic

#1F4B8E #8E1F4B #4B8E1F

tetradic

#1F4B8E #8E1F83 #8E621F #1F8E2B

square

#1F4B8E #8E1F83 #8E621F #1F8E2B

split-complementary

#1F4B8E #8E2B1F #838E1F

monochromatic

#09162A #14305C #1F4B8E #2A66C0 #4F85D9

Accessibility & contrast

On white

8.55

#1F4B8E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.46

#1F4B8E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4B8E

8.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4B8E	#FFFFFF	#000000	##FFFFFF
##1F4B8E	1.00	8.55	2.46	8.55
#FFFFFF	8.55	1.00	21.00	1.00
#000000	2.46	21.00	1.00	21.00
##FFFFFF	8.55	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#275291

Deuteranopia (green-blind)

#0D488D

Tritanopia (blue-blind)

#005B65

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #1f4b8e;
/* rgb */ color: rgb(31, 75, 142);
/* oklch */ color: oklch(42.1% 0.121 258.8);

Tailwind

colors: {
  custom: {
    50: '#6c7caf',
    500: '#1f4b8e',
    950: '#000000',
  },
}

SCSS

$custom: #1f4b8e;
$custom-light: #6c7caf;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4b8e",
  "rgb": {
    "r": 31,
    "g": 75,
    "b": 142
  },
  "hsl": {
    "h": 216.216,
    "s": 64.162,
    "l": 33.922
  },
  "oklch": {
    "l": 0.42053,
    "c": 0.12131,
    "h": 258.8
  },
  "luminance": 0.07276
}

Semantic roles & 50–950 ramp

primary

#1F4B8E

secondary

#BB904D

accent

#A541E7

background

#F6F7FA

surface

#ECEEF5

border

#C7C9CF

text

#080910

muted

#7A7B7F

Preview Lab

Preview with #1F4B8E

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

Preview Lab → · Contrast checker → · Palette generator →