#1A237B#1A237B

#1A237B is a dark, vivid blue. Relative luminance 0.029; OKLCH L 31.8% C 0.147 H 270.4°. Best body text is #FFFFFF at 13.37:1 contrast (WCAG AA passes).

Color values

HEX	#1A237B
RGB	rgb(26, 35, 123)
HSL	hsl(234, 65%, 29%)
HSV	hsv(234, 79%, 48%)
CMYK	cmyk(78.9%, 71.5%, 0%, 51.8%)
CIE-LAB	lab(19.44, 29.48, -50.75)
CIE-LCH	lch(19.44, 58.69, 300.15°)
OKLab	oklab(31.75% 0.0011 -0.1469)
OKLCH	oklch(31.75% 0.147 270.4)
XYZ	xyz(4.6010, 2.8512, 19.0429)
Luminance	0.0285 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1A237B #7B721A

analogous

#1A547B #1A237B #421A7B

triadic

#1A237B #7B1A23 #237B1A

tetradic

#1A237B #7B1A54 #7B721A #1A7B42

square

#1A237B #7B1A54 #7B721A #1A7B42

split-complementary

#1A237B #7B421A #547B1A

monochromatic

#050719 #0F1548 #1A237B #2531AE #3A48D5

Accessibility & contrast

On white

13.37

#1A237B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.57

#1A237B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1A237B

13.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1A237B	#FFFFFF	#000000	##FFFFFF
##1A237B	1.00	13.37	1.57	13.37
#FFFFFF	13.37	1.00	21.00	1.00
#000000	1.57	21.00	1.00	21.00
##FFFFFF	13.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00347E

Deuteranopia (green-blind)

#002A79

Tritanopia (blue-blind)

#003B4C

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #1a237b;
/* rgb */ color: rgb(26, 35, 123);
/* oklch */ color: oklch(31.8% 0.147 270.4);

Tailwind

colors: {
  custom: {
    50: '#685ea2',
    500: '#1a237b',
    950: '#000000',
  },
}

SCSS

$custom: #1a237b;
$custom-light: #685ea2;
$custom-dark: #000000;

JSON

{
  "hex": "#1a237b",
  "rgb": {
    "r": 26,
    "g": 35,
    "b": 123
  },
  "hsl": {
    "h": 234.433,
    "s": 65.101,
    "l": 29.216
  },
  "oklch": {
    "l": 0.31754,
    "c": 0.14688,
    "h": 270.4
  },
  "luminance": 0.02852
}

Semantic roles & 50–950 ramp

primary

#1A237B

secondary

#AFA542

accent

#D840E8

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#07040F

muted

#7A797F

Preview Lab

Preview with #1A237B

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

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