#1B308D#1B308D

#1B308D is a dark, vivid blue. Relative luminance 0.043; OKLCH L 36.0% C 0.155 H 267.6°. Best body text is #FFFFFF at 11.33:1 contrast (WCAG AA passes).

Color values

HEX	#1B308D
RGB	rgb(27, 48, 141)
HSL	hsl(229, 68%, 33%)
HSV	hsv(229, 81%, 55%)
CMYK	cmyk(80.9%, 66%, 0%, 44.7%)
CIE-LAB	lab(24.54, 27.76, -53.68)
CIE-LCH	lch(24.54, 60.43, 297.35°)
OKLab	oklab(36.03% -0.0066 -0.1553)
OKLCH	oklch(36.03% 0.155 267.6)
XYZ	xyz(6.3150, 4.2693, 25.6854)
Luminance	0.0427 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B308D #8D781B

analogous

#1B698D #1B308D #3F1B8D

triadic

#1B308D #8D1B30 #308D1B

tetradic

#1B308D #8D1B69 #8D781B #1B8D3F

square

#1B308D #8D1B69 #8D781B #1B8D3F

split-complementary

#1B308D #8D3F1B #698D1B

monochromatic

#070D26 #111F5A #1B308D #2541C0 #4762DC

Accessibility & contrast

On white

11.33

#1B308D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.85

#1B308D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B308D

11.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B308D	#FFFFFF	#000000	##FFFFFF
##1B308D	1.00	11.33	1.85	11.33
#FFFFFF	11.33	1.00	21.00	1.00
#000000	1.85	21.00	1.00	21.00
##FFFFFF	11.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004090

Deuteranopia (green-blind)

#00358B

Tritanopia (blue-blind)

#00495A

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #1b308d;
/* rgb */ color: rgb(27, 48, 141);
/* oklch */ color: oklch(36.0% 0.155 267.6);

Tailwind

colors: {
  custom: {
    50: '#6c68af',
    500: '#1b308d',
    950: '#000000',
  },
}

SCSS

$custom: #1b308d;
$custom-light: #6c68af;
$custom-dark: #000000;

JSON

{
  "hex": "#1b308d",
  "rgb": {
    "r": 27,
    "g": 48,
    "b": 141
  },
  "hsl": {
    "h": 228.947,
    "s": 67.857,
    "l": 32.941
  },
  "oklch": {
    "l": 0.36034,
    "c": 0.15549,
    "h": 267.6
  },
  "luminance": 0.0427
}

Semantic roles & 50–950 ramp

primary

#1B308D

secondary

#BDA746

accent

#CB3DEB

background

#F7F6FA

surface

#EDEBF5

border

#C8C6CF

text

#080610

muted

#7B7A7F

Preview Lab

Preview with #1B308D

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

Preview Lab → · Contrast checker → · Palette generator →