#1B4F9E#1B4F9E

#1B4F9E is a dark, vivid blue. Relative luminance 0.083; OKLCH L 44.0% C 0.140 H 259.0°. Best body text is #FFFFFF at 7.90:1 contrast (WCAG AA passes).

Color values

HEX	#1B4F9E
RGB	rgb(27, 79, 158)
HSL	hsl(216, 71%, 36%)
HSV	hsv(216, 83%, 62%)
CMYK	cmyk(82.9%, 50%, 0%, 38%)
CIE-LAB	lab(34.58, 13.33, -47.73)
CIE-LCH	lch(34.58, 49.56, 285.60°)
OKLab	oklab(44.03% -0.0266 -0.1373)
OKLCH	oklch(44.03% 0.14 259)
XYZ	xyz(9.4173, 8.2924, 33.4454)
Luminance	0.0829 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4F9E #9E6A1B

analogous

#1B919E #1B4F9E #281B9E

triadic

#1B4F9E #9E1B4F #4F9E1B

tetradic

#1B4F9E #9E1B91 #9E6A1B #1B9E28

square

#1B4F9E #9E1B91 #9E6A1B #1B9E28

split-complementary

#1B4F9E #9E281B #919E1B

monochromatic

#091B35 #12356A #1B4F9E #2469D2 #528BE1

Accessibility & contrast

On white

7.90

#1B4F9E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.66

#1B4F9E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4F9E

7.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4F9E	#FFFFFF	#000000	##FFFFFF
##1B4F9E	1.00	7.90	2.66	7.90
#FFFFFF	7.90	1.00	21.00	1.00
#000000	2.66	21.00	1.00	21.00
##FFFFFF	7.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1F58A1

Deuteranopia (green-blind)

#004C9C

Tritanopia (blue-blind)

#00626F

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #1b4f9e;
/* rgb */ color: rgb(27, 79, 158);
/* oklch */ color: oklch(44.0% 0.140 259.0);

Tailwind

colors: {
  custom: {
    50: '#6e7fbb',
    500: '#1b4f9e',
    950: '#000000',
  },
}

SCSS

$custom: #1b4f9e;
$custom-light: #6e7fbb;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4f9e",
  "rgb": {
    "r": 27,
    "g": 79,
    "b": 158
  },
  "hsl": {
    "h": 216.183,
    "s": 70.811,
    "l": 36.275
  },
  "oklch": {
    "l": 0.44029,
    "c": 0.13991,
    "h": 259
  },
  "luminance": 0.08294
}

Semantic roles & 50–950 ramp

primary

#1B4F9E

secondary

#C49651

accent

#A63AEE

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#080A12

muted

#7B7C81

Preview Lab

Preview with #1B4F9E

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

Preview Lab → · Contrast checker → · Palette generator →