#1F4181#1F4181

#1F4181 is a dark, moderate blue. Relative luminance 0.057; OKLCH L 38.8% C 0.115 H 261.6°. Best body text is #FFFFFF at 9.85:1 contrast (WCAG AA passes).

Color values

HEX	#1F4181
RGB	rgb(31, 65, 129)
HSL	hsl(219, 61%, 31%)
HSV	hsv(219, 76%, 51%)
CMYK	cmyk(76%, 49.6%, 0%, 49.4%)
CIE-LAB	lab(28.53, 11.66, -39.72)
CIE-LCH	lch(28.53, 41.40, 286.36°)
OKLab	oklab(38.77% -0.0168 -0.114)
OKLCH	oklch(38.77% 0.115 261.6)
XYZ	xyz(6.4164, 5.6562, 21.5182)
Luminance	0.0566 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4181 #815F1F

analogous

#1F7281 #1F4181 #2E1F81

triadic

#1F4181 #811F41 #41811F

tetradic

#1F4181 #811F72 #815F1F #1F812E

square

#1F4181 #811F72 #815F1F #1F812E

split-complementary

#1F4181 #812E1F #72811F

monochromatic

#070F1E #132850 #1F4181 #2B5AB2 #4778D3

Accessibility & contrast

On white

9.85

#1F4181 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.13

#1F4181 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4181

9.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4181	#FFFFFF	#000000	##FFFFFF
##1F4181	1.00	9.85	2.13	9.85
#FFFFFF	9.85	1.00	21.00	1.00
#000000	2.13	21.00	1.00	21.00
##FFFFFF	9.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1E4883

Deuteranopia (green-blind)

#023F80

Tritanopia (blue-blind)

#00505A

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #1f4181;
/* rgb */ color: rgb(31, 65, 129);
/* oklch */ color: oklch(38.8% 0.115 261.6);

Tailwind

colors: {
  custom: {
    50: '#6975a6',
    500: '#1f4181',
    950: '#000000',
  },
}

SCSS

$custom: #1f4181;
$custom-light: #6975a6;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4181",
  "rgb": {
    "r": 31,
    "g": 65,
    "b": 129
  },
  "hsl": {
    "h": 219.184,
    "s": 61.25,
    "l": 31.373
  },
  "oklch": {
    "l": 0.38772,
    "c": 0.11525,
    "h": 261.6
  },
  "luminance": 0.05657
}

Semantic roles & 50–950 ramp

primary

#1F4181

secondary

#B48E48

accent

#AD43E4

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#07080F

muted

#7A7B7F

Preview Lab

Preview with #1F4181

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

Preview Lab → · Contrast checker → · Palette generator →