#1F289A#1F289A

#1F289A is a dark, vivid blue. Relative luminance 0.041; OKLCH L 36.2% C 0.181 H 270.0°. Best body text is #FFFFFF at 11.49:1 contrast (WCAG AA passes).

Color values

HEX	#1F289A
RGB	rgb(31, 40, 154)
HSL	hsl(236, 66%, 36%)
HSV	hsv(236, 80%, 60%)
CMYK	cmyk(79.9%, 74%, 0%, 39.6%)
CIE-LAB	lab(24.13, 38.13, -62.36)
CIE-LCH	lch(24.13, 73.09, 301.44°)
OKLab	oklab(36.18% 0 -0.1806)
OKLCH	oklch(36.18% 0.181 270)
XYZ	xyz(7.1546, 4.1412, 30.9878)
Luminance	0.0414 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F289A #9A911F

analogous

#1F669A #1F289A #541F9A

triadic

#1F289A #9A1F28 #289A1F

tetradic

#1F289A #9A1F66 #9A911F #1F9A54

square

#1F289A #9A1F66 #9A911F #1F9A54

split-complementary

#1F289A #9A541F #669A1F

monochromatic

#0A0E34 #151B67 #1F289A #2935CD #5660DD

Accessibility & contrast

On white

11.49

#1F289A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.83

#1F289A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F289A

11.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F289A	#FFFFFF	#000000	##FFFFFF
##1F289A	1.00	11.49	1.83	11.49
#FFFFFF	11.49	1.00	21.00	1.00
#000000	1.83	21.00	1.00	21.00
##FFFFFF	11.49	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003F9D

Deuteranopia (green-blind)

#003398

Tritanopia (blue-blind)

#00495E

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #1f289a;
/* rgb */ color: rgb(31, 40, 154);
/* oklch */ color: oklch(36.2% 0.181 270.0);

Tailwind

colors: {
  custom: {
    50: '#7263b9',
    500: '#1f289a',
    950: '#000000',
  },
}

SCSS

$custom: #1f289a;
$custom-light: #7263b9;
$custom-dark: #000000;

JSON

{
  "hex": "#1f289a",
  "rgb": {
    "r": 31,
    "g": 40,
    "b": 154
  },
  "hsl": {
    "h": 235.61,
    "s": 66.486,
    "l": 36.275
  },
  "oklch": {
    "l": 0.36184,
    "c": 0.18062,
    "h": 270
  },
  "luminance": 0.04142
}

Semantic roles & 50–950 ramp

primary

#1F289A

secondary

#C1B954

accent

#DD3EE9

background

#F7F5FB

surface

#EEEAF6

border

#C9C6D0

text

#090512

muted

#7B7981

Preview Lab

Preview with #1F289A

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

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