#1D3F9F#1D3F9F

#1D3F9F is a dark, vivid blue. Relative luminance 0.063; OKLCH L 40.7% C 0.161 H 265.0°. Best body text is #FFFFFF at 9.28:1 contrast (WCAG AA passes).

Color values

HEX	#1D3F9F
RGB	rgb(29, 63, 159)
HSL	hsl(224, 69%, 37%)
HSV	hsv(224, 82%, 62%)
CMYK	cmyk(81.8%, 60.4%, 0%, 37.6%)
CIE-LAB	lab(30.20, 24.80, -55.44)
CIE-LCH	lch(30.20, 60.74, 294.10°)
OKLab	oklab(40.75% -0.0141 -0.1603)
OKLCH	oklch(40.75% 0.161 265)
XYZ	xyz(8.5400, 6.3184, 33.5636)
Luminance	0.0632 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3F9F #9F7D1D

analogous

#1D809F #1D3F9F #3C1D9F

triadic

#1D3F9F #9F1D3F #3F9F1D

tetradic

#1D3F9F #9F1D80 #9F7D1D #1D9F3C

square

#1D3F9F #9F1D80 #9F7D1D #1D9F3C

split-complementary

#1D3F9F #9F3C1D #809F1D

monochromatic

#0A1637 #142A6B #1D3F9F #2654D3 #567AE0

Accessibility & contrast

On white

9.28

#1D3F9F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.26

#1D3F9F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3F9F

9.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3F9F	#FFFFFF	#000000	##FFFFFF
##1D3F9F	1.00	9.28	2.26	9.28
#FFFFFF	9.28	1.00	21.00	1.00
#000000	2.26	21.00	1.00	21.00
##FFFFFF	9.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004DA2

Deuteranopia (green-blind)

#00419D

Tritanopia (blue-blind)

#005868

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #1d3f9f;
/* rgb */ color: rgb(29, 63, 159);
/* oklch */ color: oklch(40.7% 0.161 265.0);

Tailwind

colors: {
  custom: {
    50: '#7073bc',
    500: '#1d3f9f',
    950: '#000000',
  },
}

SCSS

$custom: #1d3f9f;
$custom-light: #7073bc;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3f9f",
  "rgb": {
    "r": 29,
    "g": 63,
    "b": 159
  },
  "hsl": {
    "h": 224.308,
    "s": 69.149,
    "l": 36.863
  },
  "oklch": {
    "l": 0.40749,
    "c": 0.16093,
    "h": 265
  },
  "luminance": 0.06319
}

Semantic roles & 50–950 ramp

primary

#1D3F9F

secondary

#C4A654

accent

#BE3CEC

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090812

muted

#7B7B81

Preview Lab

Preview with #1D3F9F

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

Preview Lab → · Contrast checker → · Palette generator →