#1F287E#1F287E

#1F287E is a dark, vivid blue. Relative luminance 0.033; OKLCH L 33.2% C 0.144 H 271.3°. Best body text is #FFFFFF at 12.63:1 contrast (WCAG AA passes).

Color values

HEX	#1F287E
RGB	rgb(31, 40, 126)
HSL	hsl(234, 61%, 31%)
HSV	hsv(234, 75%, 49%)
CMYK	cmyk(75.4%, 68.3%, 0%, 50.6%)
CIE-LAB	lab(21.26, 27.83, -49.64)
CIE-LCH	lch(21.26, 56.91, 299.28°)
OKLab	oklab(33.25% 0.0033 -0.1435)
OKLCH	oklch(33.25% 0.144 271.3)
XYZ	xyz(5.0885, 3.3147, 20.1063)
Luminance	0.0331 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F287E #7E751F

analogous

#1F577E #1F287E #451F7E

triadic

#1F287E #7E1F28 #287E1F

tetradic

#1F287E #7E1F57 #7E751F #1F7E45

square

#1F287E #7E1F57 #7E751F #1F7E45

split-complementary

#1F287E #7E451F #577E1F

monochromatic

#07091C #13184D #1F287E #2B38AF #4653D1

Accessibility & contrast

On white

12.63

#1F287E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.66

#1F287E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F287E

12.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F287E	#FFFFFF	#000000	##FFFFFF
##1F287E	1.00	12.63	1.66	12.63
#FFFFFF	12.63	1.00	21.00	1.00
#000000	1.66	21.00	1.00	21.00
##FFFFFF	12.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003881

Deuteranopia (green-blind)

#002F7C

Tritanopia (blue-blind)

#003F4F

Achromatopsia (no color)

#333333

Design tokens & code

CSS

--color: #1f287e;
/* rgb */ color: rgb(31, 40, 126);
/* oklch */ color: oklch(33.2% 0.144 271.3);

Tailwind

colors: {
  custom: {
    50: '#6a62a4',
    500: '#1f287e',
    950: '#000000',
  },
}

SCSS

$custom: #1f287e;
$custom-light: #6a62a4;
$custom-dark: #000000;

JSON

{
  "hex": "#1f287e",
  "rgb": {
    "r": 31,
    "g": 40,
    "b": 126
  },
  "hsl": {
    "h": 234.316,
    "s": 60.51,
    "l": 30.784
  },
  "oklch": {
    "l": 0.33247,
    "c": 0.14357,
    "h": 271.3
  },
  "luminance": 0.03315
}

Semantic roles & 50–950 ramp

primary

#1F287E

secondary

#B1A748

accent

#D544E4

background

#F6F5FA

surface

#ECEAF4

border

#C7C6CE

text

#07050F

muted

#7A797F

Preview Lab

Preview with #1F287E

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

Preview Lab → · Contrast checker → · Palette generator →