#1B407D#1B407D

#1B407D is a dark, moderate blue. Relative luminance 0.054; OKLCH L 38.1% C 0.112 H 259.9°. Best body text is #FFFFFF at 10.12:1 contrast (WCAG AA passes).

Color values

HEX	#1B407D
RGB	rgb(27, 64, 125)
HSL	hsl(217, 64%, 30%)
HSV	hsv(217, 78%, 49%)
CMYK	cmyk(78.4%, 48.8%, 0%, 51%)
CIE-LAB	lab(27.79, 10.18, -38.42)
CIE-LCH	lch(27.79, 39.74, 284.84°)
OKLab	oklab(38.07% -0.0196 -0.1103)
OKLCH	oklch(38.07% 0.112 259.9)
XYZ	xyz(5.9857, 5.3798, 20.1210)
Luminance	0.0538 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B407D #7D581B

analogous

#1B717D #1B407D #271B7D

triadic

#1B407D #7D1B40 #407D1B

tetradic

#1B407D #7D1B71 #7D581B #1B7D27

square

#1B407D #7D1B71 #7D581B #1B7D27

split-complementary

#1B407D #7D271B #717D1B

monochromatic

#050D19 #10264B #1B407D #265AAF #3D77D5

Accessibility & contrast

On white

10.12

#1B407D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.08

#1B407D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B407D

10.12:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B407D	#FFFFFF	#000000	##FFFFFF
##1B407D	1.00	10.12	2.08	10.12
#FFFFFF	10.12	1.00	21.00	1.00
#000000	2.08	21.00	1.00	21.00
##FFFFFF	10.12	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1F467F

Deuteranopia (green-blind)

#053D7C

Tritanopia (blue-blind)

#004E58

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #1b407d;
/* rgb */ color: rgb(27, 64, 125);
/* oklch */ color: oklch(38.1% 0.112 259.9);

Tailwind

colors: {
  custom: {
    50: '#6774a3',
    500: '#1b407d',
    950: '#000000',
  },
}

SCSS

$custom: #1b407d;
$custom-light: #6774a3;
$custom-dark: #000000;

JSON

{
  "hex": "#1b407d",
  "rgb": {
    "r": 27,
    "g": 64,
    "b": 125
  },
  "hsl": {
    "h": 217.347,
    "s": 64.474,
    "l": 29.804
  },
  "oklch": {
    "l": 0.38073,
    "c": 0.11199,
    "h": 259.9
  },
  "luminance": 0.0538
}

Semantic roles & 50–950 ramp

primary

#1B407D

secondary

#B18743

accent

#A840E7

background

#F6F7FA

surface

#EBEDF4

border

#C6C8CE

text

#07080F

muted

#7A7B7F

Preview Lab

Preview with #1B407D

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

Preview Lab → · Contrast checker → · Palette generator →