#4283BB#4283BB

#4283BB is a mid, moderate cyan. Relative luminance 0.210; OKLCH L 59.2% C 0.109 H 246.9°. Best body text is #000000 at 5.20:1 contrast (WCAG AA passes).

Color values

HEX	#4283BB
RGB	rgb(66, 131, 187)
HSL	hsl(208, 48%, 50%)
HSV	hsv(208, 65%, 73%)
CMYK	cmyk(64.7%, 29.9%, 0%, 26.7%)
CIE-LAB	lab(52.92, -3.05, -35.50)
CIE-LCH	lch(52.92, 35.63, 265.08°)
OKLab	oklab(59.22% -0.0427 -0.1002)
OKLCH	oklch(59.22% 0.109 246.9)
XYZ	xyz(19.3294, 20.9768, 50.0343)
Luminance	0.2098 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4283BB #BB7A42

analogous

#42BBB7 #4283BB #4246BB

triadic

#4283BB #BB4283 #83BB42

tetradic

#4283BB #B742BB #BB7A42 #46BB42

square

#4283BB #B742BB #BB7A42 #46BB42

split-complementary

#4283BB #BB4246 #BBB742

monochromatic

#224461 #32638E #4283BB #6EA1CC #9CBEDC

Accessibility & contrast

On white

4.04

#4283BB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.20

#4283BB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4283BB

5.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4283BB	#FFFFFF	#000000	##000000
##4283BB	1.00	4.04	5.20	5.20
#FFFFFF	4.04	1.00	21.00	21.00
#000000	5.20	21.00	1.00	1.00
##000000	5.20	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6A85BD

Deuteranopia (green-blind)

#5A79BA

Tritanopia (blue-blind)

#009097

Achromatopsia (no color)

#7E7E7E

Design tokens & code

CSS

--color: #4283bb;
/* rgb */ color: rgb(66, 131, 187);
/* oklch */ color: oklch(59.2% 0.109 246.9);

Tailwind

colors: {
  custom: {
    50: '#82a6cf',
    500: '#4283bb',
    950: '#000000',
  },
}

SCSS

$custom: #4283bb;
$custom-light: #82a6cf;
$custom-dark: #000000;

JSON

{
  "hex": "#4283bb",
  "rgb": {
    "r": 66,
    "g": 131,
    "b": 187
  },
  "hsl": {
    "h": 207.769,
    "s": 47.826,
    "l": 49.608
  },
  "oklch": {
    "l": 0.59224,
    "c": 0.10891,
    "h": 246.9
  },
  "luminance": 0.20979
}

Semantic roles & 50–950 ramp

primary

#4283BB

secondary

#C8AA91

accent

#8F50D7

background

#F8FAFC

surface

#F0F4F9

border

#CBCED2

text

#0B0F14

muted

#7C7F82

Preview Lab

Preview with #4283BB

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

Preview Lab → · Contrast checker → · Palette generator →