#1D287F#1D287F

#1D287F is a dark, vivid blue. Relative luminance 0.033; OKLCH L 33.2% C 0.146 H 270.4°. Best body text is #FFFFFF at 12.63:1 contrast (WCAG AA passes).

Color values

HEX	#1D287F
RGB	rgb(29, 40, 127)
HSL	hsl(233, 63%, 31%)
HSV	hsv(233, 77%, 50%)
CMYK	cmyk(77.2%, 68.5%, 0%, 50.2%)
CIE-LAB	lab(21.25, 27.98, -50.31)
CIE-LCH	lch(21.25, 57.56, 299.08°)
OKLab	oklab(33.24% 0.001 -0.1455)
OKLCH	oklch(33.24% 0.146 270.4)
XYZ	xyz(5.0949, 3.3106, 20.4450)
Luminance	0.0331 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D287F #7F741D

analogous

#1D597F #1D287F #431D7F

triadic

#1D287F #7F1D28 #287F1D

tetradic

#1D287F #7F1D59 #7F741D #1D7F43

square

#1D287F #7F1D59 #7F741D #1D7F43

split-complementary

#1D287F #7F431D #597F1D

monochromatic

#06091B #12184D #1D287F #2838B1 #4253D4

Accessibility & contrast

On white

12.63

#1D287F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.66

#1D287F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D287F

12.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D287F	#FFFFFF	#000000	##FFFFFF
##1D287F	1.00	12.63	1.66	12.63
#FFFFFF	12.63	1.00	21.00	1.00
#000000	1.66	21.00	1.00	21.00
##FFFFFF	12.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003882

Deuteranopia (green-blind)

#002E7D

Tritanopia (blue-blind)

#003F50

Achromatopsia (no color)

#333333

Design tokens & code

CSS

--color: #1d287f;
/* rgb */ color: rgb(29, 40, 127);
/* oklch */ color: oklch(33.2% 0.146 270.4);

Tailwind

colors: {
  custom: {
    50: '#6a62a5',
    500: '#1d287f',
    950: '#000000',
  },
}

SCSS

$custom: #1d287f;
$custom-light: #6a62a5;
$custom-dark: #000000;

JSON

{
  "hex": "#1d287f",
  "rgb": {
    "r": 29,
    "g": 40,
    "b": 127
  },
  "hsl": {
    "h": 233.265,
    "s": 62.821,
    "l": 30.588
  },
  "oklch": {
    "l": 0.33235,
    "c": 0.14551,
    "h": 270.4
  },
  "luminance": 0.03311
}

Semantic roles & 50–950 ramp

primary

#1D287F

secondary

#B2A645

accent

#D342E6

background

#F6F5FA

surface

#ECEAF4

border

#C7C6CE

text

#07050F

muted

#7A797F

Preview Lab

Preview with #1D287F

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

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