#1F4387#1F4387

#1F4387 is a dark, vivid blue. Relative luminance 0.061; OKLCH L 39.7% C 0.121 H 261.6°. Best body text is #FFFFFF at 9.50:1 contrast (WCAG AA passes).

Color values

HEX	#1F4387
RGB	rgb(31, 67, 135)
HSL	hsl(219, 63%, 33%)
HSV	hsv(219, 77%, 53%)
CMYK	cmyk(77%, 50.4%, 0%, 47.1%)
CIE-LAB	lab(29.55, 12.69, -41.81)
CIE-LCH	lch(29.55, 43.69, 286.89°)
OKLab	oklab(39.69% -0.0176 -0.1201)
OKLCH	oklch(39.69% 0.121 261.6)
XYZ	xyz(6.9438, 6.0541, 23.7196)
Luminance	0.0605 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4387 #87631F

analogous

#1F7787 #1F4387 #2F1F87

triadic

#1F4387 #871F43 #43871F

tetradic

#1F4387 #871F77 #87631F #1F872F

square

#1F4387 #871F77 #87631F #1F872F

split-complementary

#1F4387 #872F1F #77871F

monochromatic

#081223 #142A55 #1F4387 #2A5CB9 #4B7BD6

Accessibility & contrast

On white

9.50

#1F4387 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.21

#1F4387 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4387

9.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4387	#FFFFFF	#000000	##FFFFFF
##1F4387	1.00	9.50	2.21	9.50
#FFFFFF	9.50	1.00	21.00	1.00
#000000	2.21	21.00	1.00	21.00
##FFFFFF	9.50	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1C4B89

Deuteranopia (green-blind)

#004186

Tritanopia (blue-blind)

#00535E

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #1f4387;
/* rgb */ color: rgb(31, 67, 135);
/* oklch */ color: oklch(39.7% 0.121 261.6);

Tailwind

colors: {
  custom: {
    50: '#6a76aa',
    500: '#1f4387',
    950: '#000000',
  },
}

SCSS

$custom: #1f4387;
$custom-light: #6a76aa;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4387",
  "rgb": {
    "r": 31,
    "g": 67,
    "b": 135
  },
  "hsl": {
    "h": 219.231,
    "s": 62.651,
    "l": 32.549
  },
  "oklch": {
    "l": 0.39689,
    "c": 0.1214,
    "h": 261.6
  },
  "luminance": 0.06055
}

Semantic roles & 50–950 ramp

primary

#1F4387

secondary

#B8924A

accent

#AD42E6

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#070810

muted

#7A7B7F

Preview Lab

Preview with #1F4387

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

Preview Lab → · Contrast checker → · Palette generator →