#1A3FB0#1A3FB0

#1A3FB0 is a dark, vivid blue. Relative luminance 0.069; OKLCH L 42.2% C 0.184 H 265.0°. Best body text is #FFFFFF at 8.82:1 contrast (WCAG AA passes).

Color values

HEX	#1A3FB0
RGB	rgb(26, 63, 176)
HSL	hsl(225, 74%, 40%)
HSV	hsv(225, 85%, 69%)
CMYK	cmyk(85.2%, 64.2%, 0%, 31%)
CIE-LAB	lab(31.60, 31.18, -63.38)
CIE-LCH	lch(31.60, 70.63, 296.19°)
OKLab	oklab(42.22% -0.016 -0.1836)
OKLCH	oklch(42.22% 0.184 265)
XYZ	xyz(10.0372, 6.9080, 41.8702)
Luminance	0.0691 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1A3FB0 #B08B1A

analogous

#1A8AB0 #1A3FB0 #401AB0

triadic

#1A3FB0 #B01A3F #3FB01A

tetradic

#1A3FB0 #B01A8A #B08B1A #1AB040

square

#1A3FB0 #B01A8A #B08B1A #1AB040

split-complementary

#1A3FB0 #B0401A #8AB01A

monochromatic

#0A1945 #122C7B #1A3FB0 #2855DF #5D7FE7

Accessibility & contrast

On white

8.82

#1A3FB0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.38

#1A3FB0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1A3FB0

8.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1A3FB0	#FFFFFF	#000000	##FFFFFF
##1A3FB0	1.00	8.82	2.38	8.82
#FFFFFF	8.82	1.00	21.00	1.00
#000000	2.38	21.00	1.00	21.00
##FFFFFF	8.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052B4

Deuteranopia (green-blind)

#0043AE

Tritanopia (blue-blind)

#005D71

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #1a3fb0;
/* rgb */ color: rgb(26, 63, 176);
/* oklch */ color: oklch(42.2% 0.184 265.0);

Tailwind

colors: {
  custom: {
    50: '#7473c9',
    500: '#1a3fb0',
    950: '#000000',
  },
}

SCSS

$custom: #1a3fb0;
$custom-light: #7473c9;
$custom-dark: #000000;

JSON

{
  "hex": "#1a3fb0",
  "rgb": {
    "r": 26,
    "g": 63,
    "b": 176
  },
  "hsl": {
    "h": 225.2,
    "s": 74.257,
    "l": 39.608
  },
  "oklch": {
    "l": 0.42218,
    "c": 0.18428,
    "h": 265
  },
  "luminance": 0.06909
}

Semantic roles & 50–950 ramp

primary

#1A3FB0

secondary

#CBAF5B

accent

#C337F1

background

#F7F7FC

surface

#EEEDF8

border

#C9C8D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #1A3FB0

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

Preview Lab → · Contrast checker → · Palette generator →