#1D3F9B#1D3F9B

#1D3F9B is a dark, vivid blue. Relative luminance 0.062; OKLCH L 40.4% C 0.155 H 264.8°. Best body text is #FFFFFF at 9.39:1 contrast (WCAG AA passes).

Color values

HEX	#1D3F9B
RGB	rgb(29, 63, 155)
HSL	hsl(224, 68%, 36%)
HSV	hsv(224, 81%, 61%)
CMYK	cmyk(81.3%, 59.4%, 0%, 39.2%)
CIE-LAB	lab(29.87, 23.22, -53.57)
CIE-LCH	lch(29.87, 58.38, 293.44°)
OKLab	oklab(40.39% -0.0142 -0.1548)
OKLCH	oklch(40.39% 0.155 264.8)
XYZ	xyz(8.1985, 6.1818, 31.7651)
Luminance	0.0618 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3F9B #9B791D

analogous

#1D7E9B #1D3F9B #3A1D9B

triadic

#1D3F9B #9B1D3F #3F9B1D

tetradic

#1D3F9B #9B1D7E #9B791D #1D9B3A

square

#1D3F9B #9B1D7E #9B791D #1D9B3A

split-complementary

#1D3F9B #9B3A1D #7E9B1D

monochromatic

#0A1534 #132A67 #1D3F9B #2754CF #5379DF

Accessibility & contrast

On white

9.39

#1D3F9B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.24

#1D3F9B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3F9B

9.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3F9B	#FFFFFF	#000000	##FFFFFF
##1D3F9B	1.00	9.39	2.24	9.39
#FFFFFF	9.39	1.00	21.00	1.00
#000000	2.24	21.00	1.00	21.00
##FFFFFF	9.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004C9E

Deuteranopia (green-blind)

#004199

Tritanopia (blue-blind)

#005666

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #1d3f9b;
/* rgb */ color: rgb(29, 63, 155);
/* oklch */ color: oklch(40.4% 0.155 264.8);

Tailwind

colors: {
  custom: {
    50: '#6f73b9',
    500: '#1d3f9b',
    950: '#000000',
  },
}

SCSS

$custom: #1d3f9b;
$custom-light: #6f73b9;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3f9b",
  "rgb": {
    "r": 29,
    "g": 63,
    "b": 155
  },
  "hsl": {
    "h": 223.81,
    "s": 68.478,
    "l": 36.078
  },
  "oklch": {
    "l": 0.40394,
    "c": 0.15544,
    "h": 264.8
  },
  "luminance": 0.06183
}

Semantic roles & 50–950 ramp

primary

#1D3F9B

secondary

#C2A452

accent

#BC3CEB

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090812

muted

#7B7B81

Preview Lab

Preview with #1D3F9B

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

Preview Lab → · Contrast checker → · Palette generator →