#1B4DA7#1B4DA7

#1B4DA7 is a dark, vivid blue. Relative luminance 0.083; OKLCH L 44.3% C 0.155 H 261.1°. Best body text is #FFFFFF at 7.88:1 contrast (WCAG AA passes).

Color values

HEX	#1B4DA7
RGB	rgb(27, 77, 167)
HSL	hsl(219, 72%, 38%)
HSV	hsv(219, 84%, 65%)
CMYK	cmyk(83.8%, 53.9%, 0%, 34.5%)
CIE-LAB	lab(34.66, 18.30, -53.01)
CIE-LCH	lch(34.66, 56.08, 289.04°)
OKLab	oklab(44.29% -0.024 -0.1529)
OKLCH	oklch(44.29% 0.155 261.1)
XYZ	xyz(10.0784, 8.3295, 37.6283)
Luminance	0.0833 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4DA7 #A7751B

analogous

#1B93A7 #1B4DA7 #2F1BA7

triadic

#1B4DA7 #A71B4D #4DA71B

tetradic

#1B4DA7 #A71B93 #A7751B #1BA72F

square

#1B4DA7 #A71B93 #A7751B #1BA72F

split-complementary

#1B4DA7 #A72F1B #93A71B

monochromatic

#0A1C3E #123572 #1B4DA7 #2465DC #588AE4

Accessibility & contrast

On white

7.88

#1B4DA7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.67

#1B4DA7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4DA7

7.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4DA7	#FFFFFF	#000000	##FFFFFF
##1B4DA7	1.00	7.88	2.67	7.88
#FFFFFF	7.88	1.00	21.00	1.00
#000000	2.67	21.00	1.00	21.00
##FFFFFF	7.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0258AA

Deuteranopia (green-blind)

#004BA5

Tritanopia (blue-blind)

#006372

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #1b4da7;
/* rgb */ color: rgb(27, 77, 167);
/* oklch */ color: oklch(44.3% 0.155 261.1);

Tailwind

colors: {
  custom: {
    50: '#717ec2',
    500: '#1b4da7',
    950: '#000000',
  },
}

SCSS

$custom: #1b4da7;
$custom-light: #717ec2;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4da7",
  "rgb": {
    "r": 27,
    "g": 77,
    "b": 167
  },
  "hsl": {
    "h": 218.571,
    "s": 72.165,
    "l": 38.039
  },
  "oklch": {
    "l": 0.44293,
    "c": 0.15479,
    "h": 261.1
  },
  "luminance": 0.08331
}

Semantic roles & 50–950 ramp

primary

#1B4DA7

secondary

#C89F56

accent

#AE39EF

background

#F7F7FC

surface

#EDEEF8

border

#C8C9D1

text

#090912

muted

#7B7B81

Preview Lab

Preview with #1B4DA7

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

Preview Lab → · Contrast checker → · Palette generator →