#1F3F85#1F3F85

#1F3F85 is a dark, vivid blue. Relative luminance 0.055; OKLCH L 38.6% C 0.124 H 263.3°. Best body text is #FFFFFF at 9.96:1 contrast (WCAG AA passes).

Color values

HEX	#1F3F85
RGB	rgb(31, 63, 133)
HSL	hsl(221, 62%, 32%)
HSV	hsv(221, 77%, 52%)
CMYK	cmyk(76.7%, 52.6%, 0%, 47.8%)
CIE-LAB	lab(28.22, 14.65, -42.71)
CIE-LCH	lch(28.22, 45.16, 288.93°)
OKLab	oklab(38.63% -0.0144 -0.1229)
OKLCH	oklch(38.63% 0.124 263.3)
XYZ	xyz(6.5747, 5.5391, 22.9084)
Luminance	0.0554 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3F85 #85651F

analogous

#1F7285 #1F3F85 #321F85

triadic

#1F3F85 #851F3F #3F851F

tetradic

#1F3F85 #851F72 #85651F #1F8532

square

#1F3F85 #851F72 #85651F #1F8532

split-complementary

#1F3F85 #85321F #72851F

monochromatic

#081022 #132753 #1F3F85 #2B57B7 #4A75D5

Accessibility & contrast

On white

9.96

#1F3F85 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.11

#1F3F85 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3F85

9.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3F85	#FFFFFF	#000000	##FFFFFF
##1F3F85	1.00	9.96	2.11	9.96
#FFFFFF	9.96	1.00	21.00	1.00
#000000	2.11	21.00	1.00	21.00
##FFFFFF	9.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#134888

Deuteranopia (green-blind)

#003E84

Tritanopia (blue-blind)

#00505B

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #1f3f85;
/* rgb */ color: rgb(31, 63, 133);
/* oklch */ color: oklch(38.6% 0.124 263.3);

Tailwind

colors: {
  custom: {
    50: '#6a73a9',
    500: '#1f3f85',
    950: '#000000',
  },
}

SCSS

$custom: #1f3f85;
$custom-light: #6a73a9;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3f85",
  "rgb": {
    "r": 31,
    "g": 63,
    "b": 133
  },
  "hsl": {
    "h": 221.176,
    "s": 62.195,
    "l": 32.157
  },
  "oklch": {
    "l": 0.38627,
    "c": 0.12371,
    "h": 263.3
  },
  "luminance": 0.0554
}

Semantic roles & 50–950 ramp

primary

#1F3F85

secondary

#B79549

accent

#B243E5

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#070810

muted

#7A7B7F

Preview Lab

Preview with #1F3F85

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

Preview Lab → · Contrast checker → · Palette generator →