#4278BC#4278BC

#4278BC is a mid, vivid cyan. Relative luminance 0.182; OKLCH L 56.8% C 0.121 H 255.2°. Best body text is #000000 at 4.64:1 contrast (WCAG AA passes).

Color values

HEX	#4278BC
RGB	rgb(66, 120, 188)
HSL	hsl(213, 48%, 50%)
HSV	hsv(213, 65%, 74%)
CMYK	cmyk(64.9%, 36.2%, 0%, 26.3%)
CIE-LAB	lab(49.76, 3.87, -41.05)
CIE-LCH	lch(49.76, 41.24, 275.39°)
OKLab	oklab(56.76% -0.0309 -0.1165)
OKLCH	oklch(56.76% 0.121 255.2)
XYZ	xyz(18.0371, 18.2203, 50.1335)
Luminance	0.1822 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4278BC #BC8642

analogous

#42B5BC #4278BC #4942BC

triadic

#4278BC #BC4278 #78BC42

tetradic

#4278BC #BC42B5 #BC8642 #42BC49

square

#4278BC #BC42B5 #BC8642 #42BC49

split-complementary

#4278BC #BC4942 #B5BC42

monochromatic

#223E61 #325B8F #4278BC #6F98CC #9CB9DC

Accessibility & contrast

On white

4.52

#4278BC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.64

#4278BC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4278BC

4.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4278BC	#FFFFFF	#000000	##000000
##4278BC	1.00	4.52	4.64	4.64
#FFFFFF	4.52	1.00	21.00	21.00
#000000	4.64	21.00	1.00	1.00
##000000	4.64	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5A7DBF

Deuteranopia (green-blind)

#4971BB

Tritanopia (blue-blind)

#008891

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #4278bc;
/* rgb */ color: rgb(66, 120, 188);
/* oklch */ color: oklch(56.8% 0.121 255.2);

Tailwind

colors: {
  custom: {
    50: '#829ed0',
    500: '#4278bc',
    950: '#000000',
  },
}

SCSS

$custom: #4278bc;
$custom-light: #829ed0;
$custom-dark: #000000;

JSON

{
  "hex": "#4278bc",
  "rgb": {
    "r": 66,
    "g": 120,
    "b": 188
  },
  "hsl": {
    "h": 213.443,
    "s": 48.031,
    "l": 49.804
  },
  "oklch": {
    "l": 0.5676,
    "c": 0.12052,
    "h": 255.2
  },
  "luminance": 0.18222
}

Semantic roles & 50–950 ramp

primary

#4278BC

secondary

#C9B091

accent

#9C50D8

background

#F8F9FC

surface

#F0F2F9

border

#CBCCD2

text

#0B0E14

muted

#7C7E82

Preview Lab

Preview with #4278BC

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

Preview Lab → · Contrast checker → · Palette generator →