#1A288F#1A288F

#1A288F is a dark, vivid blue. Relative luminance 0.037; OKLCH L 34.8% C 0.168 H 268.8°. Best body text is #FFFFFF at 12.04:1 contrast (WCAG AA passes).

Color values

HEX	#1A288F
RGB	rgb(26, 40, 143)
HSL	hsl(233, 69%, 33%)
HSV	hsv(233, 82%, 56%)
CMYK	cmyk(81.8%, 72%, 0%, 43.9%)
CIE-LAB	lab(22.72, 33.73, -57.91)
CIE-LCH	lch(22.72, 67.02, 300.22°)
OKLab	oklab(34.76% -0.0036 -0.1678)
OKLCH	oklch(34.76% 0.168 268.8)
XYZ	xyz(6.1410, 3.7197, 26.3756)
Luminance	0.0372 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1A288F #8F811A

analogous

#1A628F #1A288F #471A8F

triadic

#1A288F #8F1A28 #288F1A

tetradic

#1A288F #8F1A62 #8F811A #1A8F47

square

#1A288F #8F1A62 #8F811A #1A8F47

split-complementary

#1A288F #8F471A #628F1A

monochromatic

#070B27 #111A5B #1A288F #2336C3 #4658DD

Accessibility & contrast

On white

12.04

#1A288F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.74

#1A288F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1A288F

12.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1A288F	#FFFFFF	#000000	##FFFFFF
##1A288F	1.00	12.04	1.74	12.04
#FFFFFF	12.04	1.00	21.00	1.00
#000000	1.74	21.00	1.00	21.00
##FFFFFF	12.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003C92

Deuteranopia (green-blind)

#00318D

Tritanopia (blue-blind)

#004558

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #1a288f;
/* rgb */ color: rgb(26, 40, 143);
/* oklch */ color: oklch(34.8% 0.168 268.8);

Tailwind

colors: {
  custom: {
    50: '#6d62b1',
    500: '#1a288f',
    950: '#000000',
  },
}

SCSS

$custom: #1a288f;
$custom-light: #6d62b1;
$custom-dark: #000000;

JSON

{
  "hex": "#1a288f",
  "rgb": {
    "r": 26,
    "g": 40,
    "b": 143
  },
  "hsl": {
    "h": 232.821,
    "s": 69.231,
    "l": 33.137
  },
  "oklch": {
    "l": 0.34756,
    "c": 0.16781,
    "h": 268.8
  },
  "luminance": 0.0372
}

Semantic roles & 50–950 ramp

primary

#1A288F

secondary

#BFB046

accent

#D73CEC

background

#F7F5FB

surface

#EDEAF6

border

#C8C6D0

text

#080511

muted

#7B7980

Preview Lab

Preview with #1A288F

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

Preview Lab → · Contrast checker → · Palette generator →