#42589B#42589B

#42589B is a mid, moderate blue. Relative luminance 0.105; OKLCH L 47.6% C 0.111 H 268.3°. Best body text is #FFFFFF at 6.77:1 contrast (WCAG AA passes).

Color values

HEX	#42589B
RGB	rgb(66, 88, 155)
HSL	hsl(225, 40%, 43%)
HSV	hsv(225, 57%, 61%)
CMYK	cmyk(57.4%, 43.2%, 0%, 39.2%)
CIE-LAB	lab(38.73, 12.47, -39.18)
CIE-LCH	lch(38.73, 41.12, 287.65°)
OKLab	oklab(47.62% -0.0033 -0.1114)
OKLCH	oklch(47.62% 0.111 268.3)
XYZ	xyz(11.6509, 10.5034, 32.4174)
Luminance	0.1050 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#42589B #9B8542

analogous

#42849B #42589B #59429B

triadic

#42589B #9B4258 #589B42

tetradic

#42589B #9B4284 #9B8542 #429B59

square

#42589B #9B4284 #9B8542 #429B59

split-complementary

#42589B #9B5942 #849B42

monochromatic

#1D2745 #304070 #42589B #5F76BB #8A9BCD

Accessibility & contrast

On white

6.77

#42589B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.10

#42589B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #42589B

6.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##42589B	#FFFFFF	#000000	##FFFFFF
##42589B	1.00	6.77	3.10	6.77
#FFFFFF	6.77	1.00	21.00	1.00
#000000	3.10	21.00	1.00	21.00
##FFFFFF	6.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3B5F9E

Deuteranopia (green-blind)

#30579A

Tritanopia (blue-blind)

#086772

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #42589b;
/* rgb */ color: rgb(66, 88, 155);
/* oklch */ color: oklch(47.6% 0.111 268.3);

Tailwind

colors: {
  custom: {
    50: '#7d86b9',
    500: '#42589b',
    950: '#000000',
  },
}

SCSS

$custom: #42589b;
$custom-light: #7d86b9;
$custom-dark: #000000;

JSON

{
  "hex": "#42589b",
  "rgb": {
    "r": 66,
    "g": 88,
    "b": 155
  },
  "hsl": {
    "h": 225.169,
    "s": 40.271,
    "l": 43.333
  },
  "oklch": {
    "l": 0.47624,
    "c": 0.11144,
    "h": 268.3
  },
  "luminance": 0.10504
}

Semantic roles & 50–950 ramp

primary

#42589B

secondary

#B8AA81

accent

#B258D0

background

#F8F8FB

surface

#EFEFF6

border

#CACAD0

text

#0A0B11

muted

#7C7C80

Preview Lab

Preview with #42589B

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

Preview Lab → · Contrast checker → · Palette generator →