#4279D9#4279D9

#4279D9 is a mid, vivid blue. Relative luminance 0.198; OKLCH L 58.8% C 0.158 H 260.7°. Best body text is #000000 at 4.97:1 contrast (WCAG AA passes).

Color values

HEX	#4279D9
RGB	rgb(66, 121, 217)
HSL	hsl(218, 67%, 55%)
HSV	hsv(218, 70%, 85%)
CMYK	cmyk(69.6%, 44.2%, 0%, 14.9%)
CIE-LAB	lab(51.66, 13.52, -54.58)
CIE-LCH	lch(51.66, 56.23, 283.91°)
OKLab	oklab(58.75% -0.0256 -0.1561)
OKLCH	oklch(58.75% 0.158 260.7)
XYZ	xyz(21.6040, 19.8405, 68.3232)
Luminance	0.1984 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4279D9 #D9A242

analogous

#42C4D9 #4279D9 #5642D9

triadic

#4279D9 #D94279 #79D942

tetradic

#4279D9 #D942C4 #D9A242 #42D956

square

#4279D9 #D942C4 #D9A242 #42D956

split-complementary

#4279D9 #D95642 #C4D942

monochromatic

#1B4286 #255BB9 #4279D9 #759DE3 #A8C1ED

Accessibility & contrast

On white

4.23

#4279D9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.97

#4279D9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4279D9

4.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4279D9	#FFFFFF	#000000	##000000
##4279D9	1.00	4.23	4.97	4.97
#FFFFFF	4.23	1.00	21.00	21.00
#000000	4.97	21.00	1.00	1.00
##000000	4.97	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#4983DD

Deuteranopia (green-blind)

#2D75D7

Tritanopia (blue-blind)

#008F9E

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #4279d9;
/* rgb */ color: rgb(66, 121, 217);
/* oklch */ color: oklch(58.8% 0.158 260.7);

Tailwind

colors: {
  custom: {
    50: '#879fe5',
    500: '#4279d9',
    950: '#000000',
  },
}

SCSS

$custom: #4279d9;
$custom-light: #879fe5;
$custom-dark: #000000;

JSON

{
  "hex": "#4279d9",
  "rgb": {
    "r": 66,
    "g": 121,
    "b": 217
  },
  "hsl": {
    "h": 218.146,
    "s": 66.52,
    "l": 55.49
  },
  "oklch": {
    "l": 0.58752,
    "c": 0.15823,
    "h": 260.7
  },
  "luminance": 0.19843
}

Semantic roles & 50–950 ramp

primary

#4279D9

secondary

#DBC49C

accent

#AB3EE9

background

#F9F9FE

surface

#F1F2FC

border

#CBCCD5

text

#0D0E16

muted

#7E7E84

Preview Lab

Preview with #4279D9

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

Preview Lab → · Contrast checker → · Palette generator →