#1D288C#1D288C

#1D288C is a dark, vivid blue. Relative luminance 0.037; OKLCH L 34.6% C 0.163 H 269.9°. Best body text is #FFFFFF at 12.11:1 contrast (WCAG AA passes).

Color values

HEX	#1D288C
RGB	rgb(29, 40, 140)
HSL	hsl(234, 66%, 33%)
HSV	hsv(234, 79%, 55%)
CMYK	cmyk(79.3%, 71.4%, 0%, 45.1%)
CIE-LAB	lab(22.55, 32.87, -56.32)
CIE-LCH	lch(22.55, 65.21, 300.27°)
OKLab	oklab(34.58% -0.0003 -0.1631)
OKLCH	oklch(34.58% 0.163 269.9)
XYZ	xyz(5.9975, 3.6716, 25.1985)
Luminance	0.0367 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D288C #8C811D

analogous

#1D5F8C #1D288C #491D8C

triadic

#1D288C #8C1D28 #288C1D

tetradic

#1D288C #8C1D5F #8C811D #1D8C49

square

#1D288C #8C1D5F #8C811D #1D8C49

split-complementary

#1D288C #8C491D #5F8C1D

monochromatic

#080B27 #121A59 #1D288C #2836BF #4A58D9

Accessibility & contrast

On white

12.11

#1D288C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.73

#1D288C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D288C

12.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D288C	#FFFFFF	#000000	##FFFFFF
##1D288C	1.00	12.11	1.73	12.11
#FFFFFF	12.11	1.00	21.00	1.00
#000000	1.73	21.00	1.00	21.00
##FFFFFF	12.11	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003B8F

Deuteranopia (green-blind)

#00318A

Tritanopia (blue-blind)

#004457

Achromatopsia (no color)

#363636

Design tokens & code

CSS

--color: #1d288c;
/* rgb */ color: rgb(29, 40, 140);
/* oklch */ color: oklch(34.6% 0.163 269.9);

Tailwind

colors: {
  custom: {
    50: '#6d62af',
    500: '#1d288c',
    950: '#000000',
  },
}

SCSS

$custom: #1d288c;
$custom-light: #6d62af;
$custom-dark: #000000;

JSON

{
  "hex": "#1d288c",
  "rgb": {
    "r": 29,
    "g": 40,
    "b": 140
  },
  "hsl": {
    "h": 234.054,
    "s": 65.68,
    "l": 33.137
  },
  "oklch": {
    "l": 0.34581,
    "c": 0.16306,
    "h": 269.9
  },
  "luminance": 0.03672
}

Semantic roles & 50–950 ramp

primary

#1D288C

secondary

#BCB049

accent

#D83FE9

background

#F7F5FA

surface

#EDEAF5

border

#C8C6CF

text

#080510

muted

#7B797F

Preview Lab

Preview with #1D288C

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

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