#4283BC#4283BC

#4283BC is a mid, moderate cyan. Relative luminance 0.210; OKLCH L 59.3% C 0.110 H 247.4°. Best body text is #000000 at 5.20:1 contrast (WCAG AA passes).

Color values

HEX	#4283BC
RGB	rgb(66, 131, 188)
HSL	hsl(208, 48%, 50%)
HSV	hsv(208, 65%, 74%)
CMYK	cmyk(64.9%, 30.3%, 0%, 26.3%)
CIE-LAB	lab(52.97, -2.71, -36.00)
CIE-LCH	lch(52.97, 36.10, 265.69°)
OKLab	oklab(59.28% -0.0424 -0.1016)
OKLCH	oklch(59.28% 0.11 247.4)
XYZ	xyz(19.4368, 21.0197, 50.6001)
Luminance	0.2102 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4283BC #BC7B42

analogous

#42BCB8 #4283BC #4246BC

triadic

#4283BC #BC4283 #83BC42

tetradic

#4283BC #B842BC #BC7B42 #46BC42

square

#4283BC #B842BC #BC7B42 #46BC42

split-complementary

#4283BC #BC4246 #BCB842

monochromatic

#224461 #32638F #4283BC #6FA1CC #9CBEDC

Accessibility & contrast

On white

4.04

#4283BC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.20

#4283BC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4283BC

5.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4283BC	#FFFFFF	#000000	##000000
##4283BC	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)

#6A85BE

Deuteranopia (green-blind)

#5979BB

Tritanopia (blue-blind)

#009197

Achromatopsia (no color)

#7E7E7E

Design tokens & code

CSS

--color: #4283bc;
/* rgb */ color: rgb(66, 131, 188);
/* oklch */ color: oklch(59.3% 0.110 247.4);

Tailwind

colors: {
  custom: {
    50: '#82a6d0',
    500: '#4283bc',
    950: '#000000',
  },
}

SCSS

$custom: #4283bc;
$custom-light: #82a6d0;
$custom-dark: #000000;

JSON

{
  "hex": "#4283bc",
  "rgb": {
    "r": 66,
    "g": 131,
    "b": 188
  },
  "hsl": {
    "h": 208.033,
    "s": 48.031,
    "l": 49.804
  },
  "oklch": {
    "l": 0.59276,
    "c": 0.11013,
    "h": 247.4
  },
  "luminance": 0.21022
}

Semantic roles & 50–950 ramp

primary

#4283BC

secondary

#C9AB91

accent

#8F50D8

background

#F8FAFC

surface

#F0F4F9

border

#CBCED2

text

#0C0F14

muted

#7D7F82

Preview Lab

Preview with #4283BC

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

Preview Lab → · Contrast checker → · Palette generator →