#1B3EB3#1B3EB3

#1B3EB3 is a dark, vivid blue. Relative luminance 0.069; OKLCH L 42.4% C 0.189 H 265.5°. Best body text is #FFFFFF at 8.80:1 contrast (WCAG AA passes).

Color values

HEX	#1B3EB3
RGB	rgb(27, 62, 179)
HSL	hsl(226, 74%, 40%)
HSV	hsv(226, 85%, 70%)
CMYK	cmyk(84.9%, 65.4%, 0%, 29.8%)
CIE-LAB	lab(31.65, 33.05, -65.07)
CIE-LCH	lch(31.65, 72.98, 296.93°)
OKLab	oklab(42.35% -0.0149 -0.1885)
OKLCH	oklch(42.35% 0.189 265.5)
XYZ	xyz(10.3084, 6.9317, 43.4337)
Luminance	0.0693 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B3EB3 #B3901B

analogous

#1B8AB3 #1B3EB3 #441BB3

triadic

#1B3EB3 #B31B3E #3EB31B

tetradic

#1B3EB3 #B31B8A #B3901B #1BB344

square

#1B3EB3 #B31B8A #B3901B #1BB344

split-complementary

#1B3EB3 #B3441B #8AB31B

monochromatic

#0B1949 #132C7E #1B3EB3 #2C55DF #6180E7

Accessibility & contrast

On white

8.80

#1B3EB3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.39

#1B3EB3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B3EB3

8.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B3EB3	#FFFFFF	#000000	##FFFFFF
##1B3EB3	1.00	8.80	2.39	8.80
#FFFFFF	8.80	1.00	21.00	1.00
#000000	2.39	21.00	1.00	21.00
##FFFFFF	8.80	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052B7

Deuteranopia (green-blind)

#0043B1

Tritanopia (blue-blind)

#005D73

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #1b3eb3;
/* rgb */ color: rgb(27, 62, 179);
/* oklch */ color: oklch(42.4% 0.189 265.5);

Tailwind

colors: {
  custom: {
    50: '#7573cb',
    500: '#1b3eb3',
    950: '#000000',
  },
}

SCSS

$custom: #1b3eb3;
$custom-light: #7573cb;
$custom-dark: #000000;

JSON

{
  "hex": "#1b3eb3",
  "rgb": {
    "r": 27,
    "g": 62,
    "b": 179
  },
  "hsl": {
    "h": 226.184,
    "s": 73.786,
    "l": 40.392
  },
  "oklch": {
    "l": 0.42351,
    "c": 0.18912,
    "h": 265.5
  },
  "luminance": 0.06933
}

Semantic roles & 50–950 ramp

primary

#1B3EB3

secondary

#CCB25E

accent

#C637F0

background

#F7F6FC

surface

#EEECF9

border

#C9C7D2

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #1B3EB3

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

Preview Lab → · Contrast checker → · Palette generator →