#1F3283#1F3283

#1F3283 is a dark, vivid blue. Relative luminance 0.042; OKLCH L 35.7% C 0.138 H 268.3°. Best body text is #FFFFFF at 11.40:1 contrast (WCAG AA passes).

Color values

HEX	#1F3283
RGB	rgb(31, 50, 131)
HSL	hsl(229, 62%, 32%)
HSV	hsv(229, 76%, 51%)
CMYK	cmyk(76.3%, 61.8%, 0%, 48.6%)
CIE-LAB	lab(24.36, 22.91, -47.74)
CIE-LCH	lch(24.36, 52.95, 295.64°)
OKLab	oklab(35.67% -0.004 -0.1378)
OKLCH	oklch(35.67% 0.138 268.3)
XYZ	xyz(5.8010, 4.2106, 21.9753)
Luminance	0.0421 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F3283 #83701F

analogous

#1F6483 #1F3283 #3E1F83

triadic

#1F3283 #831F32 #32831F

tetradic

#1F3283 #831F64 #83701F #1F833E

square

#1F3283 #831F64 #83701F #1F833E

split-complementary

#1F3283 #833E1F #64831F

monochromatic

#080C20 #131F52 #1F3283 #2B45B4 #4963D4

Accessibility & contrast

On white

11.40

#1F3283 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.84

#1F3283 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F3283

11.40:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F3283	#FFFFFF	#000000	##FFFFFF
##1F3283	1.00	11.40	1.84	11.40
#FFFFFF	11.40	1.00	21.00	1.00
#000000	1.84	21.00	1.00	21.00
##FFFFFF	11.40	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003F86

Deuteranopia (green-blind)

#003581

Tritanopia (blue-blind)

#004655

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #1f3283;
/* rgb */ color: rgb(31, 50, 131);
/* oklch */ color: oklch(35.7% 0.138 268.3);

Tailwind

colors: {
  custom: {
    50: '#6b69a8',
    500: '#1f3283',
    950: '#000000',
  },
}

SCSS

$custom: #1f3283;
$custom-light: #6b69a8;
$custom-dark: #000000;

JSON

{
  "hex": "#1f3283",
  "rgb": {
    "r": 31,
    "g": 50,
    "b": 131
  },
  "hsl": {
    "h": 228.6,
    "s": 61.728,
    "l": 31.765
  },
  "oklch": {
    "l": 0.35668,
    "c": 0.1379,
    "h": 268.3
  },
  "luminance": 0.04211
}

Semantic roles & 50–950 ramp

primary

#1F3283

secondary

#B6A148

accent

#C643E5

background

#F6F6FA

surface

#ECEBF4

border

#C7C6CE

text

#080610

muted

#7A7A7F

Preview Lab

Preview with #1F3283

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

Preview Lab → · Contrast checker → · Palette generator →