#4B78BB#4B78BB

#4B78BB is a mid, moderate blue. Relative luminance 0.185; OKLCH L 57.1% C 0.115 H 258.2°. Best body text is #000000 at 4.70:1 contrast (WCAG AA passes).

Color values

HEX	#4B78BB
RGB	rgb(75, 120, 187)
HSL	hsl(216, 45%, 51%)
HSV	hsv(216, 60%, 73%)
CMYK	cmyk(59.9%, 35.8%, 0%, 26.7%)
CIE-LAB	lab(50.11, 5.23, -39.90)
CIE-LCH	lch(50.11, 40.24, 277.47°)
OKLab	oklab(57.13% -0.0237 -0.113)
OKLCH	oklch(57.13% 0.115 258.2)
XYZ	xyz(18.5846, 18.5150, 49.5985)
Luminance	0.1852 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4B78BB #BB8E4B

analogous

#4BB0BB #4B78BB #564BBB

triadic

#4B78BB #BB4B78 #78BB4B

tetradic

#4B78BB #BB4BB0 #BB8E4B #4BBB56

square

#4B78BB #BB4BB0 #BB8E4B #4BBB56

split-complementary

#4B78BB #BB564B #B0BB4B

monochromatic

#264065 #375B92 #4B78BB #7799CC #A4BBDD

Accessibility & contrast

On white

4.46

#4B78BB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.70

#4B78BB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #4B78BB

4.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4B78BB	#FFFFFF	#000000	##000000
##4B78BB	1.00	4.46	4.70	4.70
#FFFFFF	4.46	1.00	21.00	21.00
#000000	4.70	21.00	1.00	1.00
##000000	4.70	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5C7DBE

Deuteranopia (green-blind)

#4D72BA

Tritanopia (blue-blind)

#008791

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #4b78bb;
/* rgb */ color: rgb(75, 120, 187);
/* oklch */ color: oklch(57.1% 0.115 258.2);

Tailwind

colors: {
  custom: {
    50: '#869ed0',
    500: '#4b78bb',
    950: '#000000',
  },
}

SCSS

$custom: #4b78bb;
$custom-light: #869ed0;
$custom-dark: #000000;

JSON

{
  "hex": "#4b78bb",
  "rgb": {
    "r": 75,
    "g": 120,
    "b": 187
  },
  "hsl": {
    "h": 215.893,
    "s": 45.161,
    "l": 51.373
  },
  "oklch": {
    "l": 0.57129,
    "c": 0.11543,
    "h": 258.2
  },
  "luminance": 0.18517
}

Semantic roles & 50–950 ramp

primary

#4B78BB

secondary

#CAB698

accent

#A153D5

background

#F8F9FC

surface

#F0F2F9

border

#CBCCD2

text

#0C0E14

muted

#7D7E82

Preview Lab

Preview with #4B78BB

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

Preview Lab → · Contrast checker → · Palette generator →