#42499B#42499B

#42499B is a dark, vivid blue. Relative luminance 0.083; OKLCH L 44.5% C 0.132 H 276.0°. Best body text is #FFFFFF at 7.90:1 contrast (WCAG AA passes).

Color values

HEX	#42499B
RGB	rgb(66, 73, 155)
HSL	hsl(235, 40%, 43%)
HSV	hsv(235, 57%, 61%)
CMYK	cmyk(57.4%, 52.9%, 0%, 39.2%)
CIE-LAB	lab(34.58, 22.24, -45.84)
CIE-LCH	lch(34.58, 50.94, 295.88°)
OKLab	oklab(44.47% 0.0137 -0.1311)
OKLCH	oklch(44.47% 0.132 276)
XYZ	xyz(10.5438, 8.2892, 32.0483)
Luminance	0.0829 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42499B #9B9442

analogous

#42759B #42499B #67429B

triadic

#42499B #9B4249 #499B42

tetradic

#42499B #9B4275 #9B9442 #429B67

square

#42499B #9B4275 #9B9442 #429B67

split-complementary

#42499B #9B6742 #759B42

monochromatic

#1D2145 #303570 #42499B #5F66BB #8A8FCD

Accessibility & contrast

On white

7.90

#42499B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.66

#42499B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #42499B

7.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42499B	#FFFFFF	#000000	##FFFFFF
##42499B	1.00	7.90	2.66	7.90
#FFFFFF	7.90	1.00	21.00	1.00
#000000	2.66	21.00	1.00	21.00
##FFFFFF	7.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1B559E

Deuteranopia (green-blind)

#094E99

Tritanopia (blue-blind)

#0F5C6B

Achromatopsia (no color)

#515151

Design tokens & code

CSS

--color: #42499b;
/* rgb */ color: rgb(66, 73, 155);
/* oklch */ color: oklch(44.5% 0.132 276.0);

Tailwind

colors: {
  custom: {
    50: '#7e7bb9',
    500: '#42499b',
    950: '#000000',
  },
}

SCSS

$custom: #42499b;
$custom-light: #7e7bb9;
$custom-dark: #000000;

JSON

{
  "hex": "#42499b",
  "rgb": {
    "r": 66,
    "g": 73,
    "b": 155
  },
  "hsl": {
    "h": 235.281,
    "s": 40.271,
    "l": 43.333
  },
  "oklch": {
    "l": 0.44467,
    "c": 0.13181,
    "h": 276
  },
  "luminance": 0.0829
}

Semantic roles & 50–950 ramp

primary

#42499B

secondary

#B8B481

accent

#C758D0

background

#F8F7FB

surface

#EFEDF6

border

#CAC8D0

text

#0B0911

muted

#7C7B80

Preview Lab

Preview with #42499B

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

Preview Lab → · Contrast checker → · Palette generator →