#1D398B#1D398B

#1D398B is a dark, vivid blue. Relative luminance 0.051; OKLCH L 37.7% C 0.141 H 265.6°. Best body text is #FFFFFF at 10.45:1 contrast (WCAG AA passes).

Color values

HEX	#1D398B
RGB	rgb(29, 57, 139)
HSL	hsl(225, 65%, 33%)
HSV	hsv(225, 79%, 55%)
CMYK	cmyk(79.1%, 59%, 0%, 45.5%)
CIE-LAB	lab(26.88, 20.98, -48.62)
CIE-LCH	lch(26.88, 52.95, 293.35°)
OKLab	oklab(37.74% -0.0108 -0.1403)
OKLCH	oklch(37.74% 0.141 265.6)
XYZ	xyz(6.6284, 5.0508, 25.0467)
Luminance	0.0505 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D398B #8B6F1D

analogous

#1D708B #1D398B #381D8B

triadic

#1D398B #8B1D39 #398B1D

tetradic

#1D398B #8B1D70 #8B6F1D #1D8B38

square

#1D398B #8B1D70 #8B6F1D #1D8B38

split-complementary

#1D398B #8B381D #708B1D

monochromatic

#080F26 #122458 #1D398B #284EBE #496ED9

Accessibility & contrast

On white

10.45

#1D398B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.01

#1D398B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D398B

10.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D398B	#FFFFFF	#000000	##FFFFFF
##1D398B	1.00	10.45	2.01	10.45
#FFFFFF	10.45	1.00	21.00	1.00
#000000	2.01	21.00	1.00	21.00
##FFFFFF	10.45	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00458E

Deuteranopia (green-blind)

#003B89

Tritanopia (blue-blind)

#004E5C

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #1d398b;
/* rgb */ color: rgb(29, 57, 139);
/* oklch */ color: oklch(37.7% 0.141 265.6);

Tailwind

colors: {
  custom: {
    50: '#6b6eae',
    500: '#1d398b',
    950: '#000000',
  },
}

SCSS

$custom: #1d398b;
$custom-light: #6b6eae;
$custom-dark: #000000;

JSON

{
  "hex": "#1d398b",
  "rgb": {
    "r": 29,
    "g": 57,
    "b": 139
  },
  "hsl": {
    "h": 224.727,
    "s": 65.476,
    "l": 32.941
  },
  "oklch": {
    "l": 0.37739,
    "c": 0.14076,
    "h": 265.6
  },
  "luminance": 0.05052
}

Semantic roles & 50–950 ramp

primary

#1D398B

secondary

#BB9E49

accent

#BD3FE8

background

#F6F6FA

surface

#ECECF4

border

#C7C7CE

text

#080710

muted

#7A7A7F

Preview Lab

Preview with #1D398B

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

Preview Lab → · Contrast checker → · Palette generator →