#1F4381#1F4381

#1F4381 is a dark, moderate blue. Relative luminance 0.059; OKLCH L 39.2% C 0.113 H 260.5°. Best body text is #FFFFFF at 9.64:1 contrast (WCAG AA passes).

Color values

HEX	#1F4381
RGB	rgb(31, 67, 129)
HSL	hsl(218, 61%, 31%)
HSV	hsv(218, 76%, 51%)
CMYK	cmyk(76%, 48.1%, 0%, 49.4%)
CIE-LAB	lab(29.13, 10.28, -38.75)
CIE-LCH	lch(29.13, 40.09, 284.85°)
OKLab	oklab(39.24% -0.0186 -0.1111)
OKLCH	oklch(39.24% 0.113 260.5)
XYZ	xyz(6.5332, 5.8899, 21.5572)
Luminance	0.0589 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4381 #815D1F

analogous

#1F7481 #1F4381 #2C1F81

triadic

#1F4381 #811F43 #43811F

tetradic

#1F4381 #811F74 #815D1F #1F812C

square

#1F4381 #811F74 #815D1F #1F812C

split-complementary

#1F4381 #812C1F #74811F

monochromatic

#07101E #132950 #1F4381 #2B5DB2 #477BD3

Accessibility & contrast

On white

9.64

#1F4381 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.18

#1F4381 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4381

9.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4381	#FFFFFF	#000000	##FFFFFF
##1F4381	1.00	9.64	2.18	9.64
#FFFFFF	9.64	1.00	21.00	1.00
#000000	2.18	21.00	1.00	21.00
##FFFFFF	9.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#224983

Deuteranopia (green-blind)

#0B4080

Tritanopia (blue-blind)

#00525B

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #1f4381;
/* rgb */ color: rgb(31, 67, 129);
/* oklch */ color: oklch(39.2% 0.113 260.5);

Tailwind

colors: {
  custom: {
    50: '#6976a6',
    500: '#1f4381',
    950: '#000000',
  },
}

SCSS

$custom: #1f4381;
$custom-light: #6976a6;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4381",
  "rgb": {
    "r": 31,
    "g": 67,
    "b": 129
  },
  "hsl": {
    "h": 217.959,
    "s": 61.25,
    "l": 31.373
  },
  "oklch": {
    "l": 0.39236,
    "c": 0.11267,
    "h": 260.5
  },
  "luminance": 0.05891
}

Semantic roles & 50–950 ramp

primary

#1F4381

secondary

#B48C48

accent

#A943E4

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#07080F

muted

#7A7B7F

Preview Lab

Preview with #1F4381

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

Preview Lab → · Contrast checker → · Palette generator →