#1B308E#1B308E

#1B308E is a dark, vivid blue. Relative luminance 0.043; OKLCH L 36.1% C 0.157 H 267.6°. Best body text is #FFFFFF at 11.29:1 contrast (WCAG AA passes).

Color values

HEX	#1B308E
RGB	rgb(27, 48, 142)
HSL	hsl(229, 68%, 33%)
HSV	hsv(229, 81%, 56%)
CMYK	cmyk(81%, 66.2%, 0%, 44.3%)
CIE-LAB	lab(24.64, 28.15, -54.14)
CIE-LCH	lch(24.64, 61.02, 297.47°)
OKLab	oklab(36.13% -0.0066 -0.1567)
OKLCH	oklch(36.13% 0.157 267.6)
XYZ	xyz(6.3897, 4.2992, 26.0790)
Luminance	0.0430 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B308E #8E791B

analogous

#1B6A8E #1B308E #3F1B8E

triadic

#1B308E #8E1B30 #308E1B

tetradic

#1B308E #8E1B6A #8E791B #1B8E3F

square

#1B308E #8E1B6A #8E791B #1B8E3F

split-complementary

#1B308E #8E3F1B #6A8E1B

monochromatic

#070D27 #111F5B #1B308E #2541C1 #4762DC

Accessibility & contrast

On white

11.29

#1B308E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.86

#1B308E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B308E

11.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B308E	#FFFFFF	#000000	##FFFFFF
##1B308E	1.00	11.29	1.86	11.29
#FFFFFF	11.29	1.00	21.00	1.00
#000000	1.86	21.00	1.00	21.00
##FFFFFF	11.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004091

Deuteranopia (green-blind)

#00358C

Tritanopia (blue-blind)

#00495A

Achromatopsia (no color)

#3A3A3A

Design tokens & code

CSS

--color: #1b308e;
/* rgb */ color: rgb(27, 48, 142);
/* oklch */ color: oklch(36.1% 0.157 267.6);

Tailwind

colors: {
  custom: {
    50: '#6c68b0',
    500: '#1b308e',
    950: '#000000',
  },
}

SCSS

$custom: #1b308e;
$custom-light: #6c68b0;
$custom-dark: #000000;

JSON

{
  "hex": "#1b308e",
  "rgb": {
    "r": 27,
    "g": 48,
    "b": 142
  },
  "hsl": {
    "h": 229.043,
    "s": 68.047,
    "l": 33.137
  },
  "oklch": {
    "l": 0.36132,
    "c": 0.15685,
    "h": 267.6
  },
  "luminance": 0.043
}

Semantic roles & 50–950 ramp

primary

#1B308E

secondary

#BEA847

accent

#CB3DEB

background

#F7F6FA

surface

#EDEBF5

border

#C8C6CF

text

#080611

muted

#7B7A80

Preview Lab

Preview with #1B308E

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

Preview Lab → · Contrast checker → · Palette generator →