#1D3FA8#1D3FA8

#1D3FA8 is a dark, vivid blue. Relative luminance 0.066; OKLCH L 41.6% C 0.173 H 265.4°. Best body text is #FFFFFF at 9.02:1 contrast (WCAG AA passes).

Color values

HEX	#1D3FA8
RGB	rgb(29, 63, 168)
HSL	hsl(225, 71%, 39%)
HSV	hsv(225, 83%, 66%)
CMYK	cmyk(82.7%, 62.5%, 0%, 34.1%)
CIE-LAB	lab(30.98, 28.32, -59.60)
CIE-LCH	lch(30.98, 65.99, 295.41°)
OKLab	oklab(41.57% -0.0139 -0.1725)
OKLCH	oklch(41.57% 0.173 265.4)
XYZ	xyz(9.3496, 6.6423, 37.8275)
Luminance	0.0664 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D3FA8 #A8861D

analogous

#1D84A8 #1D3FA8 #411DA8

triadic

#1D3FA8 #A81D3F #3FA81D

tetradic

#1D3FA8 #A81D84 #A8861D #1DA841

square

#1D3FA8 #A81D84 #A8861D #1DA841

split-complementary

#1D3FA8 #A8411D #84A81D

monochromatic

#0B1840 #142B74 #1D3FA8 #2854DA #5C7DE3

Accessibility & contrast

On white

9.02

#1D3FA8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.33

#1D3FA8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D3FA8

9.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D3FA8	#FFFFFF	#000000	##FFFFFF
##1D3FA8	1.00	9.02	2.33	9.02
#FFFFFF	9.02	1.00	21.00	1.00
#000000	2.33	21.00	1.00	21.00
##FFFFFF	9.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050AB

Deuteranopia (green-blind)

#0043A6

Tritanopia (blue-blind)

#005A6D

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #1d3fa8;
/* rgb */ color: rgb(29, 63, 168);
/* oklch */ color: oklch(41.6% 0.173 265.4);

Tailwind

colors: {
  custom: {
    50: '#7373c3',
    500: '#1d3fa8',
    950: '#000000',
  },
}

SCSS

$custom: #1d3fa8;
$custom-light: #7373c3;
$custom-dark: #000000;

JSON

{
  "hex": "#1d3fa8",
  "rgb": {
    "r": 29,
    "g": 63,
    "b": 168
  },
  "hsl": {
    "h": 225.324,
    "s": 70.558,
    "l": 38.627
  },
  "oklch": {
    "l": 0.41568,
    "c": 0.17305,
    "h": 265.4
  },
  "luminance": 0.06643
}

Semantic roles & 50–950 ramp

primary

#1D3FA8

secondary

#C7AC5A

accent

#C23AED

background

#F7F7FC

surface

#EEEDF8

border

#C9C8D1

text

#090813

muted

#7B7B82

Preview Lab

Preview with #1D3FA8

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

Preview Lab → · Contrast checker → · Palette generator →