#1D398A#1D398A

#1D398A is a dark, vivid blue. Relative luminance 0.050; OKLCH L 37.7% C 0.139 H 265.5°. Best body text is #FFFFFF at 10.48:1 contrast (WCAG AA passes).

Color values

HEX	#1D398A
RGB	rgb(29, 57, 138)
HSL	hsl(225, 65%, 33%)
HSV	hsv(225, 79%, 54%)
CMYK	cmyk(79%, 58.7%, 0%, 45.9%)
CIE-LAB	lab(26.80, 20.58, -48.13)
CIE-LCH	lch(26.80, 52.35, 293.16°)
OKLab	oklab(37.65% -0.0108 -0.1389)
OKLCH	oklch(37.65% 0.139 265.5)
XYZ	xyz(6.5557, 5.0217, 24.6636)
Luminance	0.0502 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D398A #8A6E1D

analogous

#1D6F8A #1D398A #371D8A

triadic

#1D398A #8A1D39 #398A1D

tetradic

#1D398A #8A1D6F #8A6E1D #1D8A37

square

#1D398A #8A1D6F #8A6E1D #1D8A37

split-complementary

#1D398A #8A371D #6F8A1D

monochromatic

#080F25 #122457 #1D398A #284EBD #496ED9

Accessibility & contrast

On white

10.48

#1D398A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.00

#1D398A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D398A

10.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D398A	#FFFFFF	#000000	##FFFFFF
##1D398A	1.00	10.48	2.00	10.48
#FFFFFF	10.48	1.00	21.00	1.00
#000000	2.00	21.00	1.00	21.00
##FFFFFF	10.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00458D

Deuteranopia (green-blind)

#003A88

Tritanopia (blue-blind)

#004D5B

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #1d398a;
/* rgb */ color: rgb(29, 57, 138);
/* oklch */ color: oklch(37.7% 0.139 265.5);

Tailwind

colors: {
  custom: {
    50: '#6b6ead',
    500: '#1d398a',
    950: '#000000',
  },
}

SCSS

$custom: #1d398a;
$custom-light: #6b6ead;
$custom-dark: #000000;

JSON

{
  "hex": "#1d398a",
  "rgb": {
    "r": 29,
    "g": 57,
    "b": 138
  },
  "hsl": {
    "h": 224.587,
    "s": 65.269,
    "l": 32.745
  },
  "oklch": {
    "l": 0.37651,
    "c": 0.13935,
    "h": 265.5
  },
  "luminance": 0.05022
}

Semantic roles & 50–950 ramp

primary

#1D398A

secondary

#BB9D48

accent

#BD40E8

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#080710

muted

#7A7A7F

Preview Lab

Preview with #1D398A

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

Preview Lab → · Contrast checker → · Palette generator →