#42339B#42339B

#42339B is a dark, vivid blue. Relative luminance 0.059; OKLCH L 40.5% C 0.161 H 283.0°. Best body text is #FFFFFF at 9.64:1 contrast (WCAG AA passes).

Color values

HEX	#42339B
RGB	rgb(66, 51, 155)
HSL	hsl(249, 50%, 40%)
HSV	hsv(249, 67%, 61%)
CMYK	cmyk(57.4%, 67.1%, 0%, 39.2%)
CIE-LAB	lab(29.14, 36.21, -54.66)
CIE-LCH	lch(29.14, 65.57, 303.53°)
OKLab	oklab(40.45% 0.0364 -0.1572)
OKLCH	oklch(40.45% 0.161 283)
XYZ	xyz(9.3452, 5.8919, 31.6488)
Luminance	0.0589 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42339B #8C9B33

analogous

#33589B #42339B #76339B

triadic

#42339B #9B4233 #339B42

tetradic

#42339B #9B3358 #8C9B33 #339B76

square

#42339B #9B3358 #8C9B33 #339B76

split-complementary

#42339B #9B7633 #589B33

monochromatic

#1B153F #2E246D #42339B #5A48C3 #8476D2

Accessibility & contrast

On white

9.64

#42339B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.18

#42339B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #42339B

9.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42339B	#FFFFFF	#000000	##FFFFFF
##42339B	1.00	9.64	2.18	9.64
#FFFFFF	9.64	1.00	21.00	1.00
#000000	2.18	21.00	1.00	21.00
##FFFFFF	9.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00489E

Deuteranopia (green-blind)

#004199

Tritanopia (blue-blind)

#154D62

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #42339b;
/* rgb */ color: rgb(66, 51, 155);
/* oklch */ color: oklch(40.5% 0.161 283.0);

Tailwind

colors: {
  custom: {
    50: '#806cb9',
    500: '#42339b',
    950: '#000000',
  },
}

SCSS

$custom: #42339b;
$custom-light: #806cb9;
$custom-dark: #000000;

JSON

{
  "hex": "#42339b",
  "rgb": {
    "r": 66,
    "g": 51,
    "b": 155
  },
  "hsl": {
    "h": 248.654,
    "s": 50.485,
    "l": 40.392
  },
  "oklch": {
    "l": 0.40452,
    "c": 0.16134,
    "h": 283
  },
  "luminance": 0.05892
}

Semantic roles & 50–950 ramp

primary

#42339B

secondary

#B0BA6F

accent

#DA4EC6

background

#F8F6FB

surface

#EFEBF6

border

#CAC6D0

text

#0B0712

muted

#7C7A81

Preview Lab

Preview with #42339B

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

Preview Lab → · Contrast checker → · Palette generator →