#1B407B#1B407B

#1B407B is a dark, moderate blue. Relative luminance 0.053; OKLCH L 37.9% C 0.109 H 259.4°. Best body text is #FFFFFF at 10.16:1 contrast (WCAG AA passes).

Color values

HEX	#1B407B
RGB	rgb(27, 64, 123)
HSL	hsl(217, 64%, 29%)
HSV	hsv(217, 78%, 48%)
CMYK	cmyk(78%, 48%, 0%, 51.8%)
CIE-LAB	lab(27.65, 9.36, -37.38)
CIE-LCH	lch(27.65, 38.54, 284.05°)
OKLab	oklab(37.92% -0.02 -0.1072)
OKLCH	oklch(37.92% 0.109 259.4)
XYZ	xyz(5.8592, 5.3292, 19.4549)
Luminance	0.0533 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B407B #7B561B

analogous

#1B707B #1B407B #261B7B

triadic

#1B407B #7B1B40 #407B1B

tetradic

#1B407B #7B1B70 #7B561B #1B7B26

square

#1B407B #7B1B70 #7B561B #1B7B26

split-complementary

#1B407B #7B261B #707B1B

monochromatic

#060D19 #102649 #1B407B #265AAD #3C77D4

Accessibility & contrast

On white

10.16

#1B407B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.07

#1B407B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B407B

10.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B407B	#FFFFFF	#000000	##FFFFFF
##1B407B	1.00	10.16	2.07	10.16
#FFFFFF	10.16	1.00	21.00	1.00
#000000	2.07	21.00	1.00	21.00
##FFFFFF	10.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#21467D

Deuteranopia (green-blind)

#0A3D7A

Tritanopia (blue-blind)

#004E57

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #1b407b;
/* rgb */ color: rgb(27, 64, 123);
/* oklch */ color: oklch(37.9% 0.109 259.4);

Tailwind

colors: {
  custom: {
    50: '#6674a2',
    500: '#1b407b',
    950: '#000000',
  },
}

SCSS

$custom: #1b407b;
$custom-light: #6674a2;
$custom-dark: #000000;

JSON

{
  "hex": "#1b407b",
  "rgb": {
    "r": 27,
    "g": 64,
    "b": 123
  },
  "hsl": {
    "h": 216.875,
    "s": 64,
    "l": 29.412
  },
  "oklch": {
    "l": 0.37923,
    "c": 0.10907,
    "h": 259.4
  },
  "luminance": 0.0533
}

Semantic roles & 50–950 ramp

primary

#1B407B

secondary

#AF8543

accent

#A741E7

background

#F6F7FA

surface

#EBEDF3

border

#C6C8CD

text

#07080F

muted

#7A7B7F

Preview Lab

Preview with #1B407B

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

Preview Lab → · Contrast checker → · Palette generator →