#1B4FA0#1B4FA0

#1B4FA0 is a dark, vivid blue. Relative luminance 0.084; OKLCH L 44.2% C 0.143 H 259.4°. Best body text is #FFFFFF at 7.86:1 contrast (WCAG AA passes).

Color values

HEX	#1B4FA0
RGB	rgb(27, 79, 160)
HSL	hsl(217, 71%, 37%)
HSV	hsv(217, 83%, 63%)
CMYK	cmyk(83.1%, 50.6%, 0%, 37.3%)
CIE-LAB	lab(34.73, 14.13, -48.71)
CIE-LCH	lch(34.73, 50.71, 286.18°)
OKLab	oklab(44.18% -0.0263 -0.1402)
OKLCH	oklch(44.18% 0.143 259.4)
XYZ	xyz(9.5908, 8.3619, 34.3594)
Luminance	0.0836 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4FA0 #A06C1B

analogous

#1B92A0 #1B4FA0 #291BA0

triadic

#1B4FA0 #A01B4F #4FA01B

tetradic

#1B4FA0 #A01B92 #A06C1B #1BA029

square

#1B4FA0 #A01B92 #A06C1B #1BA029

split-complementary

#1B4FA0 #A0291B #92A01B

monochromatic

#091B37 #12356C #1B4FA0 #2469D4 #538BE2

Accessibility & contrast

On white

7.86

#1B4FA0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.67

#1B4FA0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4FA0

7.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4FA0	#FFFFFF	#000000	##FFFFFF
##1B4FA0	1.00	7.86	2.67	7.86
#FFFFFF	7.86	1.00	21.00	1.00
#000000	2.67	21.00	1.00	21.00
##FFFFFF	7.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1D58A3

Deuteranopia (green-blind)

#004C9E

Tritanopia (blue-blind)

#006370

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #1b4fa0;
/* rgb */ color: rgb(27, 79, 160);
/* oklch */ color: oklch(44.2% 0.143 259.4);

Tailwind

colors: {
  custom: {
    50: '#6f7fbd',
    500: '#1b4fa0',
    950: '#000000',
  },
}

SCSS

$custom: #1b4fa0;
$custom-light: #6f7fbd;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4fa0",
  "rgb": {
    "r": 27,
    "g": 79,
    "b": 160
  },
  "hsl": {
    "h": 216.541,
    "s": 71.123,
    "l": 36.667
  },
  "oklch": {
    "l": 0.44182,
    "c": 0.14267,
    "h": 259.4
  },
  "luminance": 0.08363
}

Semantic roles & 50–950 ramp

primary

#1B4FA0

secondary

#C59852

accent

#A83AEE

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#090A12

muted

#7B7C81

Preview Lab

Preview with #1B4FA0

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

Preview Lab → · Contrast checker → · Palette generator →