#1F3E8A#1F3E8A

#1F3E8A is a dark, vivid blue. Relative luminance 0.056; OKLCH L 38.8% C 0.132 H 264.3°. Best body text is #FFFFFF at 9.93:1 contrast (WCAG AA passes).

Color values

HEX	#1F3E8A
RGB	rgb(31, 62, 138)
HSL	hsl(223, 63%, 33%)
HSV	hsv(223, 78%, 54%)
CMYK	cmyk(77.5%, 55.1%, 0%, 45.9%)
CIE-LAB	lab(28.30, 17.35, -45.68)
CIE-LCH	lch(28.30, 48.86, 290.80°)
OKLab	oklab(38.81% -0.0131 -0.1316)
OKLCH	oklch(38.81% 0.132 264.3)
XYZ	xyz(6.8735, 5.5708, 24.7528)
Luminance	0.0557 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3E8A #8A6B1F

analogous

#1F738A #1F3E8A #351F8A

triadic

#1F3E8A #8A1F3E #3E8A1F

tetradic

#1F3E8A #8A1F73 #8A6B1F #1F8A35

square

#1F3E8A #8A1F73 #8A6B1F #1F8A35

split-complementary

#1F3E8A #8A351F #738A1F

monochromatic

#091126 #142858 #1F3E8A #2A54BC #4C75D7

Accessibility & contrast

On white

9.93

#1F3E8A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.11

#1F3E8A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3E8A

9.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3E8A	#FFFFFF	#000000	##FFFFFF
##1F3E8A	1.00	9.93	2.11	9.93
#FFFFFF	9.93	1.00	21.00	1.00
#000000	2.11	21.00	1.00	21.00
##FFFFFF	9.93	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#02488D

Deuteranopia (green-blind)

#003E88

Tritanopia (blue-blind)

#00515D

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #1f3e8a;
/* rgb */ color: rgb(31, 62, 138);
/* oklch */ color: oklch(38.8% 0.132 264.3);

Tailwind

colors: {
  custom: {
    50: '#6b72ad',
    500: '#1f3e8a',
    950: '#000000',
  },
}

SCSS

$custom: #1f3e8a;
$custom-light: #6b72ad;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3e8a",
  "rgb": {
    "r": 31,
    "g": 62,
    "b": 138
  },
  "hsl": {
    "h": 222.617,
    "s": 63.314,
    "l": 33.137
  },
  "oklch": {
    "l": 0.3881,
    "c": 0.13225,
    "h": 264.3
  },
  "luminance": 0.05572
}

Semantic roles & 50–950 ramp

primary

#1F3E8A

secondary

#BA9A4B

accent

#B741E6

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#080810

muted

#7A7B7F

Preview Lab

Preview with #1F3E8A

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

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