#1B407A#1B407A

#1B407A is a dark, moderate blue. Relative luminance 0.053; OKLCH L 37.8% C 0.108 H 259.2°. Best body text is #FFFFFF at 10.19:1 contrast (WCAG AA passes).

Color values

HEX	#1B407A
RGB	rgb(27, 64, 122)
HSL	hsl(217, 64%, 29%)
HSV	hsv(217, 78%, 48%)
CMYK	cmyk(77.9%, 47.5%, 0%, 52.2%)
CIE-LAB	lab(27.58, 8.95, -36.86)
CIE-LCH	lch(27.58, 37.94, 283.65°)
OKLab	oklab(37.85% -0.0202 -0.1057)
OKLCH	oklch(37.85% 0.108 259.2)
XYZ	xyz(5.7970, 5.3043, 19.1269)
Luminance	0.0530 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B407A #7A551B

analogous

#1B707A #1B407A #261B7A

triadic

#1B407A #7A1B40 #407A1B

tetradic

#1B407A #7A1B70 #7A551B #1B7A26

square

#1B407A #7A1B70 #7A551B #1B7A26

split-complementary

#1B407A #7A261B #707A1B

monochromatic

#060D19 #102648 #1B407A #265AAC #3C77D4

Accessibility & contrast

On white

10.19

#1B407A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.06

#1B407A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B407A

10.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B407A	#FFFFFF	#000000	##FFFFFF
##1B407A	1.00	10.19	2.06	10.19
#FFFFFF	10.19	1.00	21.00	1.00
#000000	2.06	21.00	1.00	21.00
##FFFFFF	10.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#22467C

Deuteranopia (green-blind)

#0C3D79

Tritanopia (blue-blind)

#004E57

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #1b407a;
/* rgb */ color: rgb(27, 64, 122);
/* oklch */ color: oklch(37.8% 0.108 259.2);

Tailwind

colors: {
  custom: {
    50: '#6674a1',
    500: '#1b407a',
    950: '#000000',
  },
}

SCSS

$custom: #1b407a;
$custom-light: #6674a1;
$custom-dark: #000000;

JSON

{
  "hex": "#1b407a",
  "rgb": {
    "r": 27,
    "g": 64,
    "b": 122
  },
  "hsl": {
    "h": 216.632,
    "s": 63.758,
    "l": 29.216
  },
  "oklch": {
    "l": 0.37848,
    "c": 0.1076,
    "h": 259.2
  },
  "luminance": 0.05305
}

Semantic roles & 50–950 ramp

primary

#1B407A

secondary

#AE8443

accent

#A641E7

background

#F6F7F9

surface

#EBEDF2

border

#C6C8CC

text

#07080F

muted

#7A7B7E

Preview Lab

Preview with #1B407A

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

Preview Lab → · Contrast checker → · Palette generator →