#1A288C#1A288C

#1A288C is a dark, vivid blue. Relative luminance 0.036; OKLCH L 34.4% C 0.164 H 268.9°. Best body text is #FFFFFF at 12.17:1 contrast (WCAG AA passes).

Color values

HEX	#1A288C
RGB	rgb(26, 40, 140)
HSL	hsl(233, 69%, 33%)
HSV	hsv(233, 81%, 55%)
CMYK	cmyk(81.4%, 71.4%, 0%, 45.1%)
CIE-LAB	lab(22.41, 32.61, -56.56)
CIE-LCH	lch(22.41, 65.29, 299.96°)
OKLab	oklab(34.44% -0.0033 -0.1638)
OKLCH	oklch(34.44% 0.164 268.9)
XYZ	xyz(5.9168, 3.6300, 25.1947)
Luminance	0.0363 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1A288C #8C7E1A

analogous

#1A618C #1A288C #451A8C

triadic

#1A288C #8C1A28 #288C1A

tetradic

#1A288C #8C1A61 #8C7E1A #1A8C45

square

#1A288C #8C1A61 #8C7E1A #1A8C45

split-complementary

#1A288C #8C451A #618C1A

monochromatic

#070B25 #101958 #1A288C #2437C0 #4457DC

Accessibility & contrast

On white

12.17

#1A288C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.73

#1A288C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1A288C

12.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1A288C	#FFFFFF	#000000	##FFFFFF
##1A288C	1.00	12.17	1.73	12.17
#FFFFFF	12.17	1.00	21.00	1.00
#000000	1.73	21.00	1.00	21.00
##FFFFFF	12.17	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003B8F

Deuteranopia (green-blind)

#00308A

Tritanopia (blue-blind)

#004457

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #1a288c;
/* rgb */ color: rgb(26, 40, 140);
/* oklch */ color: oklch(34.4% 0.164 268.9);

Tailwind

colors: {
  custom: {
    50: '#6c62af',
    500: '#1a288c',
    950: '#000000',
  },
}

SCSS

$custom: #1a288c;
$custom-light: #6c62af;
$custom-dark: #000000;

JSON

{
  "hex": "#1a288c",
  "rgb": {
    "r": 26,
    "g": 40,
    "b": 140
  },
  "hsl": {
    "h": 232.632,
    "s": 68.675,
    "l": 32.549
  },
  "oklch": {
    "l": 0.34435,
    "c": 0.16387,
    "h": 268.9
  },
  "luminance": 0.03631
}

Semantic roles & 50–950 ramp

primary

#1A288C

secondary

#BEAF44

accent

#D63CEC

background

#F7F5FA

surface

#EDEAF5

border

#C8C6CF

text

#080510

muted

#7B797F

Preview Lab

Preview with #1A288C

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

Preview Lab → · Contrast checker → · Palette generator →