#1C237B#1C237B

#1C237B is a dark, vivid blue. Relative luminance 0.029; OKLCH L 31.9% C 0.146 H 271.3°. Best body text is #FFFFFF at 13.33:1 contrast (WCAG AA passes).

Color values

HEX	#1C237B
RGB	rgb(28, 35, 123)
HSL	hsl(236, 63%, 30%)
HSV	hsv(236, 77%, 48%)
CMYK	cmyk(77.2%, 71.5%, 0%, 51.8%)
CIE-LAB	lab(19.55, 29.69, -50.56)
CIE-LCH	lch(19.55, 58.63, 300.42°)
OKLab	oklab(31.87% 0.0033 -0.1463)
OKLCH	oklch(31.87% 0.146 271.3)
XYZ	xyz(4.6539, 2.8785, 19.0454)
Luminance	0.0288 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C237B #7B741C

analogous

#1C537B #1C237B #451C7B

triadic

#1C237B #7B1C23 #237B1C

tetradic

#1C237B #7B1C53 #7B741C #1C7B45

square

#1C237B #7B1C53 #7B741C #1C7B45

split-complementary

#1C237B #7B451C #537B1C

monochromatic

#060719 #111549 #1C237B #2731AD #3E49D3

Accessibility & contrast

On white

13.33

#1C237B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.58

#1C237B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C237B

13.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C237B	#FFFFFF	#000000	##FFFFFF
##1C237B	1.00	13.33	1.58	13.33
#FFFFFF	13.33	1.00	21.00	1.00
#000000	1.58	21.00	1.00	21.00
##FFFFFF	13.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00347E

Deuteranopia (green-blind)

#002B79

Tritanopia (blue-blind)

#003B4C

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #1c237b;
/* rgb */ color: rgb(28, 35, 123);
/* oklch */ color: oklch(31.9% 0.146 271.3);

Tailwind

colors: {
  custom: {
    50: '#695ea2',
    500: '#1c237b',
    950: '#000000',
  },
}

SCSS

$custom: #1c237b;
$custom-light: #695ea2;
$custom-dark: #000000;

JSON

{
  "hex": "#1c237b",
  "rgb": {
    "r": 28,
    "g": 35,
    "b": 123
  },
  "hsl": {
    "h": 235.579,
    "s": 62.914,
    "l": 29.608
  },
  "oklch": {
    "l": 0.31866,
    "c": 0.14632,
    "h": 271.3
  },
  "luminance": 0.02879
}

Semantic roles & 50–950 ramp

primary

#1C237B

secondary

#AFA744

accent

#DA42E6

background

#F6F5FA

surface

#ECE9F4

border

#C7C5CE

text

#07040F

muted

#7A797F

Preview Lab

Preview with #1C237B

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

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