Warm Blue#4B57DB

#4B57DB is a mid, vivid blue. Relative luminance 0.134; OKLCH L 52.7% C 0.199 H 273.4°. Best body text is #FFFFFF at 5.70:1 contrast (WCAG AA passes).

Warm Blue — editorial page

Color values

HEX	#4B57DB
RGB	rgb(75, 87, 219)
HSL	hsl(235, 67%, 58%)
HSV	hsv(235, 66%, 86%)
CMYK	cmyk(65.8%, 60.3%, 0%, 14.1%)
CIE-LAB	lab(43.40, 36.80, -69.04)
CIE-LCH	lch(43.40, 78.24, 298.06°)
OKLab	oklab(52.67% 0.0119 -0.199)
OKLCH	oklch(52.67% 0.199 273.4)
XYZ	xyz(19.0918, 13.4250, 68.5893)
Luminance	0.1343 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4B57DB #DBCF4B

analogous

#4B9FDB #4B57DB #874BDB

triadic

#4B57DB #DB4B57 #57DB4B

tetradic

#4B57DB #DB4B9F #DBCF4B #4BDB87

square

#4B57DB #DB4B9F #DBCF4B #4BDB87

split-complementary

#4B57DB #DB874B #9FDB4B

monochromatic

#1D268F #2734C2 #4B57DB #7E87E5 #B1B6EF

Accessibility & contrast

On white

5.70

#4B57DB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.69

#4B57DB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4B57DB

5.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4B57DB	#FFFFFF	#000000	##FFFFFF
##4B57DB	1.00	5.70	3.69	5.70
#FFFFFF	5.70	1.00	21.00	1.00
#000000	3.69	21.00	1.00	21.00
##FFFFFF	5.70	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#006DDF

Deuteranopia (green-blind)

#0060D8

Tritanopia (blue-blind)

#007891

Achromatopsia (no color)

#676767

Design tokens & code

CSS

--color: #4b57db;
/* rgb */ color: rgb(75, 87, 219);
/* oklch */ color: oklch(52.7% 0.199 273.4);

Tailwind

colors: {
  custom: {
    50: '#8d86e7',
    500: '#4b57db',
    950: '#000000',
  },
}

SCSS

$custom: #4b57db;
$custom-light: #8d86e7;
$custom-dark: #000000;

JSON

{
  "hex": "#4b57db",
  "rgb": {
    "r": 75,
    "g": 87,
    "b": 219
  },
  "hsl": {
    "h": 235,
    "s": 66.667,
    "l": 57.647
  },
  "oklch": {
    "l": 0.52671,
    "c": 0.19931,
    "h": 273.4
  },
  "luminance": 0.13427
}

Semantic roles & 50–950 ramp

primary

#4B57DB

secondary

#DED9A4

accent

#DB3EEA

background

#F9F8FE

surface

#F2EFFD

border

#CCCAD5

text

#0E0B16

muted

#7E7C84

Preview Lab

Preview with #4B57DB

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

Preview Lab → · Contrast checker → · Palette generator →