#1A3F91#1A3F91

#1A3F91 is a dark, vivid blue. Relative luminance 0.058; OKLCH L 39.4% C 0.142 H 263.1°. Best body text is #FFFFFF at 9.71:1 contrast (WCAG AA passes).

Color values

HEX	#1A3F91
RGB	rgb(26, 63, 145)
HSL	hsl(221, 70%, 34%)
HSV	hsv(221, 82%, 57%)
CMYK	cmyk(82.1%, 56.6%, 0%, 43.1%)
CIE-LAB	lab(28.95, 18.91, -48.95)
CIE-LCH	lch(28.95, 52.48, 291.12°)
OKLab	oklab(39.42% -0.017 -0.1413)
OKLCH	oklch(39.42% 0.142 263.1)
XYZ	xyz(7.3125, 5.8181, 27.5202)
Luminance	0.0582 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1A3F91 #916C1A

analogous

#1A7A91 #1A3F91 #311A91

triadic

#1A3F91 #911A3F #3F911A

tetradic

#1A3F91 #911A7A #916C1A #1A9131

square

#1A3F91 #911A7A #916C1A #1A9131

split-complementary

#1A3F91 #91311A #7A911A

monochromatic

#071229 #11285D #1A3F91 #2356C5 #4776DE

Accessibility & contrast

On white

9.71

#1A3F91 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.16

#1A3F91 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1A3F91

9.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1A3F91	#FFFFFF	#000000	##FFFFFF
##1A3F91	1.00	9.71	2.16	9.71
#FFFFFF	9.71	1.00	21.00	1.00
#000000	2.16	21.00	1.00	21.00
##FFFFFF	9.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004A94

Deuteranopia (green-blind)

#003F8F

Tritanopia (blue-blind)

#005361

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #1a3f91;
/* rgb */ color: rgb(26, 63, 145);
/* oklch */ color: oklch(39.4% 0.142 263.1);

Tailwind

colors: {
  custom: {
    50: '#6c73b2',
    500: '#1a3f91',
    950: '#000000',
  },
}

SCSS

$custom: #1a3f91;
$custom-light: #6c73b2;
$custom-dark: #000000;

JSON

{
  "hex": "#1a3f91",
  "rgb": {
    "r": 26,
    "g": 63,
    "b": 145
  },
  "hsl": {
    "h": 221.345,
    "s": 69.591,
    "l": 33.529
  },
  "oklch": {
    "l": 0.39419,
    "c": 0.14232,
    "h": 263.1
  },
  "luminance": 0.05819
}

Semantic roles & 50–950 ramp

primary

#1A3F91

secondary

#C09A47

accent

#B53BEC

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#080811

muted

#7B7B80

Preview Lab

Preview with #1A3F91

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

Preview Lab → · Contrast checker → · Palette generator →