#4259CB#4259CB

#4259CB is a mid, vivid blue. Relative luminance 0.126; OKLCH L 51.2% C 0.178 H 270.3°. Best body text is #FFFFFF at 5.96:1 contrast (WCAG AA passes).

Color values

HEX	#4259CB
RGB	rgb(66, 89, 203)
HSL	hsl(230, 57%, 53%)
HSV	hsv(230, 67%, 80%)
CMYK	cmyk(67.5%, 56.2%, 0%, 20.4%)
CIE-LAB	lab(42.17, 28.71, -61.87)
CIE-LCH	lch(42.17, 68.20, 294.89°)
OKLab	oklab(51.25% 0.0009 -0.1781)
OKLCH	oklch(51.25% 0.178 270.3)
XYZ	xyz(16.5950, 12.6132, 58.0484)
Luminance	0.1262 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4259CB #CBB442

analogous

#429DCB #4259CB #6F42CB

triadic

#4259CB #CB4259 #59CB42

tetradic

#4259CB #CB429D #CBB442 #42CB6F

square

#4259CB #CB429D #CBB442 #42CB6F

split-complementary

#4259CB #CB6F42 #9DCB42

monochromatic

#202E73 #2D41A3 #4259CB #7283D8 #A2ADE5

Accessibility & contrast

On white

5.96

#4259CB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.52

#4259CB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4259CB

5.96:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4259CB	#FFFFFF	#000000	##FFFFFF
##4259CB	1.00	5.96	3.52	5.96
#FFFFFF	5.96	1.00	21.00	1.00
#000000	3.52	21.00	1.00	21.00
##FFFFFF	5.96	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#006ACF

Deuteranopia (green-blind)

#005EC9

Tritanopia (blue-blind)

#007589

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #4259cb;
/* rgb */ color: rgb(66, 89, 203);
/* oklch */ color: oklch(51.2% 0.178 270.3);

Tailwind

colors: {
  custom: {
    50: '#8687dc',
    500: '#4259cb',
    950: '#000000',
  },
}

SCSS

$custom: #4259cb;
$custom-light: #8687dc;
$custom-dark: #000000;

JSON

{
  "hex": "#4259cb",
  "rgb": {
    "r": 66,
    "g": 89,
    "b": 203
  },
  "hsl": {
    "h": 229.927,
    "s": 56.846,
    "l": 52.745
  },
  "oklch": {
    "l": 0.51248,
    "c": 0.17808,
    "h": 270.3
  },
  "luminance": 0.12615
}

Semantic roles & 50–950 ramp

primary

#4259CB

secondary

#D2C897

accent

#C748E0

background

#F8F8FD

surface

#F0EFFB

border

#CBCAD4

text

#0C0B15

muted

#7D7C83

Preview Lab

Preview with #4259CB

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

Preview Lab → · Contrast checker → · Palette generator →