#283F61#283F61

#283F61 is a dark, moderate blue. Relative luminance 0.049; OKLCH L 36.6% C 0.066 H 258.0°. Best body text is #FFFFFF at 10.64:1 contrast (WCAG AA passes).

Color values

HEX	#283F61
RGB	rgb(40, 63, 97)
HSL	hsl(216, 42%, 27%)
HSV	hsv(216, 59%, 38%)
CMYK	cmyk(58.8%, 35.1%, 0%, 62%)
CIE-LAB	lab(26.36, 2.36, -22.84)
CIE-LCH	lch(26.36, 22.96, 275.90°)
OKLab	oklab(36.57% -0.0137 -0.0644)
OKLCH	oklch(36.57% 0.066 258)
XYZ	xyz(4.8095, 4.8688, 11.9933)
Luminance	0.0487 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#283F61 #614A28

analogous

#285C61 #283F61 #2D2861

triadic

#283F61 #61283F #3F6128

tetradic

#283F61 #61285C #614A28 #28612D

square

#283F61 #61285C #614A28 #28612D

split-complementary

#283F61 #612D28 #5C6128

monochromatic

#090E16 #162336 #283F61 #3A5B8C #4E78B6

Accessibility & contrast

On white

10.64

#283F61 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.97

#283F61 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #283F61

10.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##283F61	#FFFFFF	#000000	##FFFFFF
##283F61	1.00	10.64	1.97	10.64
#FFFFFF	10.64	1.00	21.00	1.00
#000000	1.97	21.00	1.00	21.00
##FFFFFF	10.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#314162

Deuteranopia (green-blind)

#2A3C60

Tritanopia (blue-blind)

#05474B

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #283f61;
/* rgb */ color: rgb(40, 63, 97);
/* oklch */ color: oklch(36.6% 0.066 258.0);

Tailwind

colors: {
  custom: {
    50: '#67738e',
    500: '#283f61',
    950: '#000000',
  },
}

SCSS

$custom: #283f61;
$custom-light: #67738e;
$custom-dark: #000000;

JSON

{
  "hex": "#283f61",
  "rgb": {
    "r": 40,
    "g": 63,
    "b": 97
  },
  "hsl": {
    "h": 215.789,
    "s": 41.606,
    "l": 26.863
  },
  "oklch": {
    "l": 0.3657,
    "c": 0.06584,
    "h": 258
  },
  "luminance": 0.04869
}

Semantic roles & 50–950 ramp

primary

#283F61

secondary

#947951

accent

#A056D1

background

#F6F6F8

surface

#EBECF0

border

#C6C7CB

text

#06080C

muted

#7A7B7D

Preview Lab

Preview with #283F61

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

Preview Lab → · Contrast checker → · Palette generator →