#1C288F#1C288F

#1C288F is a dark, vivid blue. Relative luminance 0.037; OKLCH L 34.8% C 0.167 H 269.4°. Best body text is #FFFFFF at 12.00:1 contrast (WCAG AA passes).

Color values

HEX	#1C288F
RGB	rgb(28, 40, 143)
HSL	hsl(234, 67%, 34%)
HSV	hsv(234, 80%, 56%)
CMYK	cmyk(80.4%, 72%, 0%, 43.9%)
CIE-LAB	lab(22.82, 33.90, -57.75)
CIE-LCH	lch(22.82, 66.97, 300.41°)
OKLab	oklab(34.85% -0.0016 -0.1673)
OKLCH	oklch(34.85% 0.167 269.4)
XYZ	xyz(6.1939, 3.7469, 26.3781)
Luminance	0.0375 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C288F #8F831C

analogous

#1C618F #1C288F #491C8F

triadic

#1C288F #8F1C28 #288F1C

tetradic

#1C288F #8F1C61 #8F831C #1C8F49

square

#1C288F #8F1C61 #8F831C #1C8F49

split-complementary

#1C288F #8F491C #618F1C

monochromatic

#080B29 #121A5C #1C288F #2636C2 #4A59DC

Accessibility & contrast

On white

12.00

#1C288F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.75

#1C288F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C288F

12.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C288F	#FFFFFF	#000000	##FFFFFF
##1C288F	1.00	12.00	1.75	12.00
#FFFFFF	12.00	1.00	21.00	1.00
#000000	1.75	21.00	1.00	21.00
##FFFFFF	12.00	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: #1c288f;
/* rgb */ color: rgb(28, 40, 143);
/* oklch */ color: oklch(34.8% 0.167 269.4);

Tailwind

colors: {
  custom: {
    50: '#6e62b1',
    500: '#1c288f',
    950: '#000000',
  },
}

SCSS

$custom: #1c288f;
$custom-light: #6e62b1;
$custom-dark: #000000;

JSON

{
  "hex": "#1c288f",
  "rgb": {
    "r": 28,
    "g": 40,
    "b": 143
  },
  "hsl": {
    "h": 233.739,
    "s": 67.251,
    "l": 33.529
  },
  "oklch": {
    "l": 0.3485,
    "c": 0.16728,
    "h": 269.4
  },
  "luminance": 0.03748
}

Semantic roles & 50–950 ramp

primary

#1C288F

secondary

#BEB149

accent

#D83EEA

background

#F7F5FB

surface

#EDEAF6

border

#C8C6D0

text

#080511

muted

#7B7980

Preview Lab

Preview with #1C288F

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

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