#423BA5#423BA5

#423BA5 is a dark, vivid blue. Relative luminance 0.070; OKLCH L 42.7% C 0.165 H 279.8°. Best body text is #FFFFFF at 8.75:1 contrast (WCAG AA passes).

Color values

HEX#423BA5
RGBrgb(66, 59, 165)
HSLhsl(244, 47%, 44%)
HSVhsv(244, 64%, 65%)
CMYKcmyk(60%, 64.2%, 0%, 35.3%)
CIE-LABlab(31.81, 34.59, -56.35)
CIE-LCHlch(31.81, 66.12, 301.54°)
OKLaboklab(42.66% 0.0279 -0.1621)
OKLCHoklch(42.66% 0.165 279.8)
XYZxyz(10.6001, 7.0020, 36.3830)
Luminance0.0700 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#423BA5 #9EA53B
analogous
#3B69A5 #423BA5 #773BA5
triadic
#423BA5 #A5423B #3BA542
tetradic
#423BA5 #A53B69 #9EA53B #3BA577
square
#423BA5 #A53B69 #9EA53B #3BA577
split-complementary
#423BA5 #A5773B #69A53B
monochromatic
#1E1B4B #302B78 #423BA5 #6059C4 #8C86D4

Accessibility & contrast

On white

8.75
#423BA5 on #FFFFFF
AA ✓AA large ✓AAA ✓

On black

2.40
#423BA5 on #000000
AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #423BA5
8.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##423BA5#FFFFFF#000000##FFFFFF
##423BA51.008.752.408.75
#FFFFFF8.751.0021.001.00
#0000002.4021.001.0021.00
##FFFFFF8.751.0021.001.00

Color blindness preview

Protanopia (red-blind)
#004FA8
Deuteranopia (green-blind)
#0047A3
Tritanopia (blue-blind)
#00566A
Achromatopsia (no color)
#4B4B4B

Design tokens & code

CSS
--color: #423ba5;
/* rgb */ color: rgb(66, 59, 165);
/* oklch */ color: oklch(42.7% 0.165 279.8);
Tailwind
colors: {
  custom: {
    50: '#8171c1',
    500: '#423ba5',
    950: '#000000',
  },
}
SCSS
$custom: #423ba5;
$custom-light: #8171c1;
$custom-dark: #000000;
JSON
{
  "hex": "#423ba5",
  "rgb": {
    "r": 66,
    "g": 59,
    "b": 165
  },
  "hsl": {
    "h": 243.962,
    "s": 47.321,
    "l": 43.922
  },
  "oklch": {
    "l": 0.42656,
    "c": 0.16452,
    "h": 279.8
  },
  "luminance": 0.07003
}

Semantic roles & 50–950 ramp

primary
#423BA5
secondary
#BABE7E
accent
#D751CE
background
#F8F6FC
surface
#EFECF8
border
#CAC7D1
text
#0B0812
muted
#7C7B81

Preview Lab

Preview with #423BA5

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

Preview Lab → · Contrast checker → · Palette generator →

#423BA5 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva