#42599B#42599B

#42599B is a mid, moderate blue. Relative luminance 0.107; OKLCH L 47.8% C 0.110 H 267.7°. Best body text is #FFFFFF at 6.70:1 contrast (WCAG AA passes).

Color values

HEX	#42599B
RGB	rgb(66, 89, 155)
HSL	hsl(224, 40%, 43%)
HSV	hsv(224, 57%, 61%)
CMYK	cmyk(57.4%, 42.6%, 0%, 39.2%)
CIE-LAB	lab(39.02, 11.82, -38.73)
CIE-LCH	lch(39.02, 40.49, 286.97°)
OKLab	oklab(47.84% -0.0045 -0.11)
OKLCH	oklch(47.84% 0.11 267.7)
XYZ	xyz(11.7336, 10.6687, 32.4449)
Luminance	0.1067 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42599B #9B8442

analogous

#42859B #42599B #57429B

triadic

#42599B #9B4259 #599B42

tetradic

#42599B #9B4285 #9B8442 #429B57

square

#42599B #9B4285 #9B8442 #429B57

split-complementary

#42599B #9B5742 #859B42

monochromatic

#1D2845 #304070 #42599B #5F77BB #8A9BCD

Accessibility & contrast

On white

6.70

#42599B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.13

#42599B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #42599B

6.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42599B	#FFFFFF	#000000	##FFFFFF
##42599B	1.00	6.70	3.13	6.70
#FFFFFF	6.70	1.00	21.00	1.00
#000000	3.13	21.00	1.00	21.00
##FFFFFF	6.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3D609E

Deuteranopia (green-blind)

#31589A

Tritanopia (blue-blind)

#076872

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #42599b;
/* rgb */ color: rgb(66, 89, 155);
/* oklch */ color: oklch(47.8% 0.110 267.7);

Tailwind

colors: {
  custom: {
    50: '#7d87b9',
    500: '#42599b',
    950: '#000000',
  },
}

SCSS

$custom: #42599b;
$custom-light: #7d87b9;
$custom-dark: #000000;

JSON

{
  "hex": "#42599b",
  "rgb": {
    "r": 66,
    "g": 89,
    "b": 155
  },
  "hsl": {
    "h": 224.494,
    "s": 40.271,
    "l": 43.333
  },
  "oklch": {
    "l": 0.47844,
    "c": 0.11014,
    "h": 267.7
  },
  "luminance": 0.1067
}

Semantic roles & 50–950 ramp

primary

#42599B

secondary

#B8AA81

accent

#B158D0

background

#F8F8FB

surface

#EFEFF6

border

#CACAD0

text

#0A0B11

muted

#7C7C80

Preview Lab

Preview with #42599B

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

Preview Lab → · Contrast checker → · Palette generator →