#1B4A7D#1B4A7D

#1B4A7D is a dark, moderate cyan. Relative luminance 0.066; OKLCH L 40.5% C 0.100 H 253.1°. Best body text is #FFFFFF at 9.04:1 contrast (WCAG AA passes).

Color values

HEX	#1B4A7D
RGB	rgb(27, 74, 125)
HSL	hsl(211, 64%, 30%)
HSV	hsv(211, 78%, 49%)
CMYK	cmyk(78.4%, 40.8%, 0%, 51%)
CIE-LAB	lab(30.90, 3.35, -33.44)
CIE-LCH	lch(30.90, 33.60, 275.73°)
OKLab	oklab(40.49% -0.029 -0.0954)
OKLCH	oklch(40.49% 0.1 253.1)
XYZ	xyz(6.6011, 6.6105, 20.3261)
Luminance	0.0661 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B4A7D #7D4E1B

analogous

#1B7B7D #1B4A7D #1D1B7D

triadic

#1B4A7D #7D1B4A #4A7D1B

tetradic

#1B4A7D #7D1B7B #7D4E1B #1B7D1D

square

#1B4A7D #7D1B7B #7D4E1B #1B7D1D

split-complementary

#1B4A7D #7D1D1B #7B7D1B

monochromatic

#050F19 #102C4B #1B4A7D #2668AF #3D86D5

Accessibility & contrast

On white

9.04

#1B4A7D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.32

#1B4A7D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B4A7D

9.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B4A7D	#FFFFFF	#000000	##FFFFFF
##1B4A7D	1.00	9.04	2.32	9.04
#FFFFFF	9.04	1.00	21.00	1.00
#000000	2.32	21.00	1.00	21.00
##FFFFFF	9.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#324E7F

Deuteranopia (green-blind)

#22457C

Tritanopia (blue-blind)

#00565D

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #1b4a7d;
/* rgb */ color: rgb(27, 74, 125);
/* oklch */ color: oklch(40.5% 0.100 253.1);

Tailwind

colors: {
  custom: {
    50: '#677ca3',
    500: '#1b4a7d',
    950: '#000000',
  },
}

SCSS

$custom: #1b4a7d;
$custom-light: #677ca3;
$custom-dark: #000000;

JSON

{
  "hex": "#1b4a7d",
  "rgb": {
    "r": 27,
    "g": 74,
    "b": 125
  },
  "hsl": {
    "h": 211.224,
    "s": 64.474,
    "l": 29.804
  },
  "oklch": {
    "l": 0.40485,
    "c": 0.09973,
    "h": 253.1
  },
  "luminance": 0.06611
}

Semantic roles & 50–950 ramp

primary

#1B4A7D

secondary

#B17C43

accent

#9740E7

background

#F6F7FA

surface

#EBEEF4

border

#C6C9CE

text

#07090F

muted

#7A7B7F

Preview Lab

Preview with #1B4A7D

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

Preview Lab → · Contrast checker → · Palette generator →