#1B357D#1B357D

#1B357D is a dark, vivid blue. Relative luminance 0.043; OKLCH L 35.6% C 0.126 H 265.3°. Best body text is #FFFFFF at 11.34:1 contrast (WCAG AA passes).

Color values

HEX	#1B357D
RGB	rgb(27, 53, 125)
HSL	hsl(224, 64%, 30%)
HSV	hsv(224, 78%, 49%)
CMYK	cmyk(78.4%, 57.6%, 0%, 51%)
CIE-LAB	lab(24.51, 17.90, -43.72)
CIE-LCH	lch(24.51, 47.24, 292.27°)
OKLab	oklab(35.58% -0.0103 -0.1261)
OKLCH	oklch(35.58% 0.126 265.3)
XYZ	xyz(5.4255, 4.2593, 19.9342)
Luminance	0.0426 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B357D #7D631B

analogous

#1B667D #1B357D #321B7D

triadic

#1B357D #7D1B35 #357D1B

tetradic

#1B357D #7D1B66 #7D631B #1B7D32

square

#1B357D #7D1B66 #7D631B #1B7D32

split-complementary

#1B357D #7D321B #667D1B

monochromatic

#050B19 #10204B #1B357D #264AAF #3D66D5

Accessibility & contrast

On white

11.34

#1B357D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.85

#1B357D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B357D

11.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B357D	#FFFFFF	#000000	##FFFFFF
##1B357D	1.00	11.34	1.85	11.34
#FFFFFF	11.34	1.00	21.00	1.00
#000000	1.85	21.00	1.00	21.00
##FFFFFF	11.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003F7F

Deuteranopia (green-blind)

#00367C

Tritanopia (blue-blind)

#004753

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #1b357d;
/* rgb */ color: rgb(27, 53, 125);
/* oklch */ color: oklch(35.6% 0.126 265.3);

Tailwind

colors: {
  custom: {
    50: '#676ba3',
    500: '#1b357d',
    950: '#000000',
  },
}

SCSS

$custom: #1b357d;
$custom-light: #676ba3;
$custom-dark: #000000;

JSON

{
  "hex": "#1b357d",
  "rgb": {
    "r": 27,
    "g": 53,
    "b": 125
  },
  "hsl": {
    "h": 224.082,
    "s": 64.474,
    "l": 29.804
  },
  "oklch": {
    "l": 0.35575,
    "c": 0.12649,
    "h": 265.3
  },
  "luminance": 0.0426
}

Semantic roles & 50–950 ramp

primary

#1B357D

secondary

#B19443

accent

#BB40E7

background

#F6F6FA

surface

#EBEBF4

border

#C6C6CE

text

#07060F

muted

#7A7A7F

Preview Lab

Preview with #1B357D

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

Preview Lab → · Contrast checker → · Palette generator →