#1B358F#1B358F

#1B358F is a dark, vivid blue. Relative luminance 0.048; OKLCH L 37.2% C 0.152 H 266.4°. Best body text is #FFFFFF at 10.76:1 contrast (WCAG AA passes).

Color values

HEX	#1B358F
RGB	rgb(27, 53, 143)
HSL	hsl(227, 68%, 33%)
HSV	hsv(227, 81%, 56%)
CMYK	cmyk(81.1%, 62.9%, 0%, 43.9%)
CIE-LAB	lab(26.04, 25.13, -52.46)
CIE-LCH	lch(26.04, 58.16, 295.60°)
OKLab	oklab(37.2% -0.0096 -0.1517)
OKLCH	oklch(37.2% 0.152 266.4)
XYZ	xyz(6.6813, 4.7616, 26.5482)
Luminance	0.0476 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B358F #8F751B

analogous

#1B6F8F #1B358F #3B1B8F

triadic

#1B358F #8F1B35 #358F1B

tetradic

#1B358F #8F1B6F #8F751B #1B8F3B

square

#1B358F #8F1B6F #8F751B #1B8F3B

split-complementary

#1B358F #8F3B1B #6F8F1B

monochromatic

#080F28 #11225C #1B358F #2548C2 #4869DC

Accessibility & contrast

On white

10.76

#1B358F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.95

#1B358F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B358F

10.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B358F	#FFFFFF	#000000	##FFFFFF
##1B358F	1.00	10.76	1.95	10.76
#FFFFFF	10.76	1.00	21.00	1.00
#000000	1.95	21.00	1.00	21.00
##FFFFFF	10.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004392

Deuteranopia (green-blind)

#00388D

Tritanopia (blue-blind)

#004C5C

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #1b358f;
/* rgb */ color: rgb(27, 53, 143);
/* oklch */ color: oklch(37.2% 0.152 266.4);

Tailwind

colors: {
  custom: {
    50: '#6c6bb1',
    500: '#1b358f',
    950: '#000000',
  },
}

SCSS

$custom: #1b358f;
$custom-light: #6c6bb1;
$custom-dark: #000000;

JSON

{
  "hex": "#1b358f",
  "rgb": {
    "r": 27,
    "g": 53,
    "b": 143
  },
  "hsl": {
    "h": 226.552,
    "s": 68.235,
    "l": 33.333
  },
  "oklch": {
    "l": 0.37201,
    "c": 0.15203,
    "h": 266.4
  },
  "luminance": 0.04762
}

Semantic roles & 50–950 ramp

primary

#1B358F

secondary

#BEA448

accent

#C43DEB

background

#F7F6FB

surface

#EDEBF6

border

#C8C6D0

text

#080611

muted

#7B7A80

Preview Lab

Preview with #1B358F

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

Preview Lab → · Contrast checker → · Palette generator →