#1D399B#1D399B

#1D399B is a dark, vivid blue. Relative luminance 0.056; OKLCH L 39.2% C 0.163 H 266.3°. Best body text is #FFFFFF at 9.95:1 contrast (WCAG AA passes).

Color values

HEX	#1D399B
RGB	rgb(29, 57, 155)
HSL	hsl(227, 68%, 36%)
HSV	hsv(227, 81%, 61%)
CMYK	cmyk(81.3%, 63.2%, 0%, 39.2%)
CIE-LAB	lab(28.26, 27.30, -56.20)
CIE-LCH	lch(28.26, 62.48, 295.91°)
OKLab	oklab(39.19% -0.0105 -0.1626)
OKLCH	oklch(39.19% 0.163 266.3)
XYZ	xyz(7.8841, 5.5531, 31.6603)
Luminance	0.0555 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D399B #9B7F1D

analogous

#1D789B #1D399B #401D9B

triadic

#1D399B #9B1D39 #399B1D

tetradic

#1D399B #9B1D78 #9B7F1D #1D9B40

square

#1D399B #9B1D78 #9B7F1D #1D9B40

split-complementary

#1D399B #9B401D #789B1D

monochromatic

#0A1334 #132667 #1D399B #274CCF #5372DF

Accessibility & contrast

On white

9.95

#1D399B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.11

#1D399B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D399B

9.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D399B	#FFFFFF	#000000	##FFFFFF
##1D399B	1.00	9.95	2.11	9.95
#FFFFFF	9.95	1.00	21.00	1.00
#000000	2.11	21.00	1.00	21.00
##FFFFFF	9.95	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00499E

Deuteranopia (green-blind)

#003D99

Tritanopia (blue-blind)

#005364

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #1d399b;
/* rgb */ color: rgb(29, 57, 155);
/* oklch */ color: oklch(39.2% 0.163 266.3);

Tailwind

colors: {
  custom: {
    50: '#706fb9',
    500: '#1d399b',
    950: '#000000',
  },
}

SCSS

$custom: #1d399b;
$custom-light: #706fb9;
$custom-dark: #000000;

JSON

{
  "hex": "#1d399b",
  "rgb": {
    "r": 29,
    "g": 57,
    "b": 155
  },
  "hsl": {
    "h": 226.667,
    "s": 68.478,
    "l": 36.078
  },
  "oklch": {
    "l": 0.39193,
    "c": 0.16294,
    "h": 266.3
  },
  "luminance": 0.05554
}

Semantic roles & 50–950 ramp

primary

#1D399B

secondary

#C2A952

accent

#C43CEB

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #1D399B

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

Preview Lab → · Contrast checker → · Palette generator →