#1F4088#1F4088

#1F4088 is a dark, vivid blue. Relative luminance 0.057; OKLCH L 39.1% C 0.127 H 263.2°. Best body text is #FFFFFF at 9.78:1 contrast (WCAG AA passes).

Color values

HEX	#1F4088
RGB	rgb(31, 64, 136)
HSL	hsl(221, 63%, 33%)
HSV	hsv(221, 77%, 53%)
CMYK	cmyk(77.2%, 52.9%, 0%, 46.7%)
CIE-LAB	lab(28.73, 15.17, -43.74)
CIE-LCH	lch(28.73, 46.30, 289.12°)
OKLab	oklab(39.09% -0.0149 -0.1259)
OKLCH	oklch(39.09% 0.127 263.2)
XYZ	xyz(6.8408, 5.7349, 24.0342)
Luminance	0.0574 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4088 #88671F

analogous

#1F7488 #1F4088 #331F88

triadic

#1F4088 #881F40 #40881F

tetradic

#1F4088 #881F74 #88671F #1F8833

square

#1F4088 #881F74 #88671F #1F8833

split-complementary

#1F4088 #88331F #74881F

monochromatic

#081124 #142956 #1F4088 #2A57BA #4B77D6

Accessibility & contrast

On white

9.78

#1F4088 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.15

#1F4088 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4088

9.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4088	#FFFFFF	#000000	##FFFFFF
##1F4088	1.00	9.78	2.15	9.78
#FFFFFF	9.78	1.00	21.00	1.00
#000000	2.15	21.00	1.00	21.00
##FFFFFF	9.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#11498B

Deuteranopia (green-blind)

#003F87

Tritanopia (blue-blind)

#00515D

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #1f4088;
/* rgb */ color: rgb(31, 64, 136);
/* oklch */ color: oklch(39.1% 0.127 263.2);

Tailwind

colors: {
  custom: {
    50: '#6b74ab',
    500: '#1f4088',
    950: '#000000',
  },
}

SCSS

$custom: #1f4088;
$custom-light: #6b74ab;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4088",
  "rgb": {
    "r": 31,
    "g": 64,
    "b": 136
  },
  "hsl": {
    "h": 221.143,
    "s": 62.874,
    "l": 32.745
  },
  "oklch": {
    "l": 0.39089,
    "c": 0.12675,
    "h": 263.2
  },
  "luminance": 0.05736
}

Semantic roles & 50–950 ramp

primary

#1F4088

secondary

#B9964A

accent

#B242E6

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#080810

muted

#7A7B7F

Preview Lab

Preview with #1F4088

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

Preview Lab → · Contrast checker → · Palette generator →