#4259CF#4259CF

#4259CF is a mid, vivid blue. Relative luminance 0.128; OKLCH L 51.6% C 0.183 H 270.3°. Best body text is #FFFFFF at 5.90:1 contrast (WCAG AA passes).

Color values

HEX	#4259CF
RGB	rgb(66, 89, 207)
HSL	hsl(230, 59%, 54%)
HSV	hsv(230, 68%, 81%)
CMYK	cmyk(68.1%, 57%, 0%, 18.8%)
CIE-LAB	lab(42.47, 30.12, -63.69)
CIE-LCH	lch(42.47, 70.46, 295.31°)
OKLab	oklab(51.56% 0.001 -0.1834)
OKLCH	oklch(51.56% 0.183 270.3)
XYZ	xyz(17.0778, 12.8064, 60.5913)
Luminance	0.1281 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4259CF #CFB842

analogous

#429FCF #4259CF #7142CF

triadic

#4259CF #CF4259 #59CF42

tetradic

#4259CF #CF429F #CFB842 #42CF71

square

#4259CF #CF429F #CFB842 #42CF71

split-complementary

#4259CF #CF7142 #9FCF42

monochromatic

#1F2D78 #2B3FA9 #4259CF #7384DB #A4AFE8

Accessibility & contrast

On white

5.90

#4259CF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.56

#4259CF on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4259CF

5.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4259CF	#FFFFFF	#000000	##FFFFFF
##4259CF	1.00	5.90	3.56	5.90
#FFFFFF	5.90	1.00	21.00	1.00
#000000	3.56	21.00	1.00	21.00
##FFFFFF	5.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#006BD3

Deuteranopia (green-blind)

#005ECD

Tritanopia (blue-blind)

#00768B

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #4259cf;
/* rgb */ color: rgb(66, 89, 207);
/* oklch */ color: oklch(51.6% 0.183 270.3);

Tailwind

colors: {
  custom: {
    50: '#8787df',
    500: '#4259cf',
    950: '#000000',
  },
}

SCSS

$custom: #4259cf;
$custom-light: #8787df;
$custom-dark: #000000;

JSON

{
  "hex": "#4259cf",
  "rgb": {
    "r": 66,
    "g": 89,
    "b": 207
  },
  "hsl": {
    "h": 230.213,
    "s": 59.494,
    "l": 53.529
  },
  "oklch": {
    "l": 0.51562,
    "c": 0.18345,
    "h": 270.3
  },
  "luminance": 0.12808
}

Semantic roles & 50–950 ramp

primary

#4259CF

secondary

#D5CB98

accent

#C945E3

background

#F8F8FD

surface

#F0EFFB

border

#CBCAD4

text

#0D0B15

muted

#7D7C83

Preview Lab

Preview with #4259CF

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

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