#1D39A8#1D39A8

#1D39A8 is a dark, vivid blue. Relative luminance 0.060; OKLCH L 40.4% C 0.180 H 266.6°. Best body text is #FFFFFF at 9.53:1 contrast (WCAG AA passes).

Color values

HEX	#1D39A8
RGB	rgb(29, 57, 168)
HSL	hsl(228, 71%, 39%)
HSV	hsv(228, 83%, 66%)
CMYK	cmyk(82.7%, 66.1%, 0%, 34.1%)
CIE-LAB	lab(29.45, 32.30, -62.11)
CIE-LCH	lch(29.45, 70.01, 297.48°)
OKLab	oklab(40.44% -0.0108 -0.1799)
OKLCH	oklch(40.44% 0.18 266.6)
XYZ	xyz(9.0352, 6.0135, 37.7227)
Luminance	0.0602 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1D39A8 #A88C1D

analogous

#1D7EA8 #1D39A8 #471DA8

triadic

#1D39A8 #A81D39 #39A81D

tetradic

#1D39A8 #A81D7E #A88C1D #1DA847

square

#1D39A8 #A81D7E #A88C1D #1DA847

split-complementary

#1D39A8 #A8471D #7EA81D

monochromatic

#0B1640 #142774 #1D39A8 #284CDA #5C78E3

Accessibility & contrast

On white

9.53

#1D39A8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.20

#1D39A8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1D39A8

9.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1D39A8	#FFFFFF	#000000	##FFFFFF
##1D39A8	1.00	9.53	2.20	9.53
#FFFFFF	9.53	1.00	21.00	1.00
#000000	2.20	21.00	1.00	21.00
##FFFFFF	9.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004CAC

Deuteranopia (green-blind)

#003FA6

Tritanopia (blue-blind)

#00576B

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #1d39a8;
/* rgb */ color: rgb(29, 57, 168);
/* oklch */ color: oklch(40.4% 0.180 266.6);

Tailwind

colors: {
  custom: {
    50: '#736fc3',
    500: '#1d39a8',
    950: '#000000',
  },
}

SCSS

$custom: #1d39a8;
$custom-light: #736fc3;
$custom-dark: #000000;

JSON

{
  "hex": "#1d39a8",
  "rgb": {
    "r": 29,
    "g": 57,
    "b": 168
  },
  "hsl": {
    "h": 227.914,
    "s": 70.558,
    "l": 38.627
  },
  "oklch": {
    "l": 0.40437,
    "c": 0.18022,
    "h": 266.6
  },
  "luminance": 0.06015
}

Semantic roles & 50–950 ramp

primary

#1D39A8

secondary

#C7B15A

accent

#C93AED

background

#F7F6FC

surface

#EEECF8

border

#C9C7D1

text

#0A0713

muted

#7C7A82

Preview Lab

Preview with #1D39A8

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

Preview Lab → · Contrast checker → · Palette generator →