#1D3BA8#1D3BA8

#1D3BA8 is a dark, vivid blue. Relative luminance 0.062; OKLCH L 40.8% C 0.178 H 266.2°. Best body text is #FFFFFF at 9.36:1 contrast (WCAG AA passes).

Color values

HEX	#1D3BA8
RGB	rgb(29, 59, 168)
HSL	hsl(227, 71%, 39%)
HSV	hsv(227, 83%, 66%)
CMYK	cmyk(82.7%, 64.9%, 0%, 34.1%)
CIE-LAB	lab(29.95, 30.98, -61.29)
CIE-LCH	lch(29.95, 68.67, 296.82°)
OKLab	oklab(40.81% -0.0118 -0.1775)
OKLCH	oklch(40.81% 0.178 266.2)
XYZ	xyz(9.1361, 6.2152, 37.7563)
Luminance	0.0622 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3BA8 #A88A1D

analogous

#1D80A8 #1D3BA8 #441DA8

triadic

#1D3BA8 #A81D3B #3BA81D

tetradic

#1D3BA8 #A81D80 #A88A1D #1DA844

square

#1D3BA8 #A81D80 #A88A1D #1DA844

split-complementary

#1D3BA8 #A8441D #80A81D

monochromatic

#0B1640 #142974 #1D3BA8 #284FDA #5C79E3

Accessibility & contrast

On white

9.36

#1D3BA8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.24

#1D3BA8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3BA8

9.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3BA8	#FFFFFF	#000000	##FFFFFF
##1D3BA8	1.00	9.36	2.24	9.36
#FFFFFF	9.36	1.00	21.00	1.00
#000000	2.24	21.00	1.00	21.00
##FFFFFF	9.36	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004DAB

Deuteranopia (green-blind)

#0040A6

Tritanopia (blue-blind)

#00586C

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #1d3ba8;
/* rgb */ color: rgb(29, 59, 168);
/* oklch */ color: oklch(40.8% 0.178 266.2);

Tailwind

colors: {
  custom: {
    50: '#7370c3',
    500: '#1d3ba8',
    950: '#000000',
  },
}

SCSS

$custom: #1d3ba8;
$custom-light: #7370c3;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3ba8",
  "rgb": {
    "r": 29,
    "g": 59,
    "b": 168
  },
  "hsl": {
    "h": 227.05,
    "s": 70.558,
    "l": 38.627
  },
  "oklch": {
    "l": 0.40807,
    "c": 0.17786,
    "h": 266.2
  },
  "luminance": 0.06216
}

Semantic roles & 50–950 ramp

primary

#1D3BA8

secondary

#C7AF5A

accent

#C73AED

background

#F7F6FC

surface

#EEECF8

border

#C9C7D1

text

#0A0713

muted

#7C7A82

Preview Lab

Preview with #1D3BA8

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

Preview Lab → · Contrast checker → · Palette generator →