#243F58#243F58

#243F58 is a dark, muted cyan. Relative luminance 0.046; OKLCH L 35.8% C 0.055 H 247.8°. Best body text is #FFFFFF at 10.90:1 contrast (WCAG AA passes).

Color values

HEX	#243F58
RGB	rgb(36, 63, 88)
HSL	hsl(209, 42%, 24%)
HSV	hsv(209, 59%, 35%)
CMYK	cmyk(59.1%, 28.4%, 0%, 65.5%)
CIE-LAB	lab(25.67, -1.91, -18.10)
CIE-LCH	lch(25.67, 18.20, 263.98°)
OKLab	oklab(35.81% -0.0207 -0.0507)
OKLCH	oklch(35.81% 0.055 247.8)
XYZ	xyz(4.2659, 4.6343, 9.9003)
Luminance	0.0464 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243F58 #583D24

analogous

#245857 #243F58 #242558

triadic

#243F58 #58243F #3F5824

tetradic

#243F58 #572458 #583D24 #255824

square

#243F58 #572458 #583D24 #255824

split-complementary

#243F58 #582425 #585724

monochromatic

#091016 #12202D #243F58 #365E83 #487DAF

Accessibility & contrast

On white

10.90

#243F58 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.93

#243F58 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243F58

10.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243F58	#FFFFFF	#000000	##FFFFFF
##243F58	1.00	10.90	1.93	10.90
#FFFFFF	10.90	1.00	21.00	1.00
#000000	1.93	21.00	1.00	21.00
##FFFFFF	10.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#354059

Deuteranopia (green-blind)

#2E3A58

Tritanopia (blue-blind)

#034548

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #243f58;
/* rgb */ color: rgb(36, 63, 88);
/* oklch */ color: oklch(35.8% 0.055 247.8);

Tailwind

colors: {
  custom: {
    50: '#637387',
    500: '#243f58',
    950: '#000000',
  },
}

SCSS

$custom: #243f58;
$custom-light: #637387;
$custom-dark: #000000;

JSON

{
  "hex": "#243f58",
  "rgb": {
    "r": 36,
    "g": 63,
    "b": 88
  },
  "hsl": {
    "h": 208.846,
    "s": 41.935,
    "l": 24.314
  },
  "oklch": {
    "l": 0.35814,
    "c": 0.05479,
    "h": 247.8
  },
  "luminance": 0.04635
}

Semantic roles & 50–950 ramp

primary

#243F58

secondary

#8C6B4C

accent

#9256D2

background

#F6F7F8

surface

#EBEDEF

border

#C6C8CA

text

#05080B

muted

#7A7B7C

Preview Lab

Preview with #243F58

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

Preview Lab → · Contrast checker → · Palette generator →