#1F3D88#1F3D88

#1F3D88 is a dark, vivid blue. Relative luminance 0.054; OKLCH L 38.4% C 0.131 H 264.5°. Best body text is #FFFFFF at 10.09:1 contrast (WCAG AA passes).

Color values

HEX	#1F3D88
RGB	rgb(31, 61, 136)
HSL	hsl(223, 63%, 33%)
HSV	hsv(223, 77%, 53%)
CMYK	cmyk(77.2%, 55.1%, 0%, 46.7%)
CIE-LAB	lab(27.86, 17.25, -45.16)
CIE-LCH	lch(27.86, 48.34, 290.90°)
OKLab	oklab(38.43% -0.0124 -0.1301)
OKLCH	oklch(38.43% 0.131 264.5)
XYZ	xyz(6.6762, 5.4056, 23.9793)
Luminance	0.0541 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3D88 #886A1F

analogous

#1F7188 #1F3D88 #351F88

triadic

#1F3D88 #881F3D #3D881F

tetradic

#1F3D88 #881F71 #886A1F #1F8835

square

#1F3D88 #881F71 #886A1F #1F8835

split-complementary

#1F3D88 #88351F #71881F

monochromatic

#081024 #142756 #1F3D88 #2A53BA #4B73D6

Accessibility & contrast

On white

10.09

#1F3D88 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.08

#1F3D88 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3D88

10.09:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3D88	#FFFFFF	#000000	##FFFFFF
##1F3D88	1.00	10.09	2.08	10.09
#FFFFFF	10.09	1.00	21.00	1.00
#000000	2.08	21.00	1.00	21.00
##FFFFFF	10.09	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#03478B

Deuteranopia (green-blind)

#003D87

Tritanopia (blue-blind)

#004F5C

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #1f3d88;
/* rgb */ color: rgb(31, 61, 136);
/* oklch */ color: oklch(38.4% 0.131 264.5);

Tailwind

colors: {
  custom: {
    50: '#6b72ab',
    500: '#1f3d88',
    950: '#000000',
  },
}

SCSS

$custom: #1f3d88;
$custom-light: #6b72ab;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3d88",
  "rgb": {
    "r": 31,
    "g": 61,
    "b": 136
  },
  "hsl": {
    "h": 222.857,
    "s": 62.874,
    "l": 32.745
  },
  "oklch": {
    "l": 0.38427,
    "c": 0.13067,
    "h": 264.5
  },
  "luminance": 0.05406
}

Semantic roles & 50–950 ramp

primary

#1F3D88

secondary

#B9994A

accent

#B742E6

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#080710

muted

#7A7A7F

Preview Lab

Preview with #1F3D88

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

Preview Lab → · Contrast checker → · Palette generator →