#1D307B#1D307B

#1D307B is a dark, vivid blue. Relative luminance 0.038; OKLCH L 34.4% C 0.130 H 268.0°. Best body text is #FFFFFF at 11.93:1 contrast (WCAG AA passes).

Color values

HEX	#1D307B
RGB	rgb(29, 48, 123)
HSL	hsl(228, 62%, 30%)
HSV	hsv(228, 76%, 48%)
CMYK	cmyk(76.4%, 61%, 0%, 51.8%)
CIE-LAB	lab(23.01, 20.88, -44.88)
CIE-LCH	lch(23.01, 49.50, 294.95°)
OKLab	oklab(34.43% -0.0046 -0.1295)
OKLCH	oklch(34.43% 0.13 268)
XYZ	xyz(5.1376, 3.8046, 19.1987)
Luminance	0.0381 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D307B #7B681D

analogous

#1D5F7B #1D307B #391D7B

triadic

#1D307B #7B1D30 #307B1D

tetradic

#1D307B #7B1D5F #7B681D #1D7B39

square

#1D307B #7B1D5F #7B681D #1D7B39

split-complementary

#1D307B #7B391D #5F7B1D

monochromatic

#060A19 #111D49 #1D307B #2943AD #405ED2

Accessibility & contrast

On white

11.93

#1D307B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.76

#1D307B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D307B

11.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D307B	#FFFFFF	#000000	##FFFFFF
##1D307B	1.00	11.93	1.76	11.93
#FFFFFF	11.93	1.00	21.00	1.00
#000000	1.76	21.00	1.00	21.00
##FFFFFF	11.93	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003B7E

Deuteranopia (green-blind)

#00337A

Tritanopia (blue-blind)

#004350

Achromatopsia (no color)

#373737

Design tokens & code

CSS

--color: #1d307b;
/* rgb */ color: rgb(29, 48, 123);
/* oklch */ color: oklch(34.4% 0.130 268.0);

Tailwind

colors: {
  custom: {
    50: '#6868a2',
    500: '#1d307b',
    950: '#000000',
  },
}

SCSS

$custom: #1d307b;
$custom-light: #6868a2;
$custom-dark: #000000;

JSON

{
  "hex": "#1d307b",
  "rgb": {
    "r": 29,
    "g": 48,
    "b": 123
  },
  "hsl": {
    "h": 227.872,
    "s": 61.842,
    "l": 29.804
  },
  "oklch": {
    "l": 0.34427,
    "c": 0.12961,
    "h": 268
  },
  "luminance": 0.03805
}

Semantic roles & 50–950 ramp

primary

#1D307B

secondary

#AF9945

accent

#C443E5

background

#F6F6FA

surface

#EBEBF3

border

#C6C6CD

text

#07060F

muted

#7A7A7F

Preview Lab

Preview with #1D307B

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

Preview Lab → · Contrast checker → · Palette generator →