#1C288B#1C288B

#1C288B is a dark, vivid blue. Relative luminance 0.036; OKLCH L 34.4% C 0.162 H 269.6°. Best body text is #FFFFFF at 12.17:1 contrast (WCAG AA passes).

Color values

HEX	#1C288B
RGB	rgb(28, 40, 139)
HSL	hsl(234, 66%, 33%)
HSV	hsv(234, 80%, 55%)
CMYK	cmyk(79.9%, 71.2%, 0%, 45.5%)
CIE-LAB	lab(22.40, 32.41, -55.95)
CIE-LCH	lch(22.40, 64.66, 300.08°)
OKLab	oklab(34.42% -0.0012 -0.162)
OKLCH	oklch(34.42% 0.162 269.6)
XYZ	xyz(5.8963, 3.6279, 24.8106)
Luminance	0.0363 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C288B #8B7F1C

analogous

#1C5F8B #1C288B #481C8B

triadic

#1C288B #8B1C28 #288B1C

tetradic

#1C288B #8B1C5F #8B7F1C #1C8B48

square

#1C288B #8B1C5F #8B7F1C #1C8B48

split-complementary

#1C288B #8B481C #5F8B1C

monochromatic

#070B25 #121958 #1C288B #2637BE #4757DA

Accessibility & contrast

On white

12.17

#1C288B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.73

#1C288B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C288B

12.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C288B	#FFFFFF	#000000	##FFFFFF
##1C288B	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)

#003B8E

Deuteranopia (green-blind)

#003089

Tritanopia (blue-blind)

#004356

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #1c288b;
/* rgb */ color: rgb(28, 40, 139);
/* oklch */ color: oklch(34.4% 0.162 269.6);

Tailwind

colors: {
  custom: {
    50: '#6d62ae',
    500: '#1c288b',
    950: '#000000',
  },
}

SCSS

$custom: #1c288b;
$custom-light: #6d62ae;
$custom-dark: #000000;

JSON

{
  "hex": "#1c288b",
  "rgb": {
    "r": 28,
    "g": 40,
    "b": 139
  },
  "hsl": {
    "h": 233.514,
    "s": 66.467,
    "l": 32.745
  },
  "oklch": {
    "l": 0.34425,
    "c": 0.16201,
    "h": 269.6
  },
  "luminance": 0.03629
}

Semantic roles & 50–950 ramp

primary

#1C288B

secondary

#BCAF47

accent

#D73EE9

background

#F7F5FA

surface

#EDEAF4

border

#C8C6CE

text

#080510

muted

#7B797F

Preview Lab

Preview with #1C288B

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

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