#4057BC#4057BC

#4057BC is a mid, vivid blue. Relative luminance 0.115; OKLCH L 49.6% C 0.161 H 269.9°. Best body text is #FFFFFF at 6.35:1 contrast (WCAG AA passes).

Color values

HEX	#4057BC
RGB	rgb(64, 87, 188)
HSL	hsl(229, 49%, 49%)
HSV	hsv(229, 66%, 74%)
CMYK	cmyk(66%, 53.7%, 0%, 26.3%)
CIE-LAB	lab(40.47, 24.36, -55.93)
CIE-LCH	lch(40.47, 61.00, 293.53°)
OKLab	oklab(49.6% -0.0002 -0.1607)
OKLCH	oklch(49.6% 0.161 269.9)
XYZ	xyz(14.5966, 11.5359, 49.0246)
Luminance	0.1154 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4057BC #BCA540

analogous

#4095BC #4057BC #6740BC

triadic

#4057BC #BC4057 #57BC40

tetradic

#4057BC #BC4095 #BCA540 #40BC67

square

#4057BC #BC4095 #BCA540 #40BC67

split-complementary

#4057BC #BC6740 #95BC40

monochromatic

#212D61 #30428E #4057BC #6C7ECD #9AA6DD

Accessibility & contrast

On white

6.35

#4057BC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.31

#4057BC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4057BC

6.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4057BC	#FFFFFF	#000000	##FFFFFF
##4057BC	1.00	6.35	3.31	6.35
#FFFFFF	6.35	1.00	21.00	1.00
#000000	3.31	21.00	1.00	21.00
##FFFFFF	6.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1065C0

Deuteranopia (green-blind)

#005ABA

Tritanopia (blue-blind)

#006F81

Achromatopsia (no color)

#5F5F5F

Design tokens & code

CSS

--color: #4057bc;
/* rgb */ color: rgb(64, 87, 188);
/* oklch */ color: oklch(49.6% 0.161 269.9);

Tailwind

colors: {
  custom: {
    50: '#8286d1',
    500: '#4057bc',
    950: '#000000',
  },
}

SCSS

$custom: #4057bc;
$custom-light: #8286d1;
$custom-dark: #000000;

JSON

{
  "hex": "#4057bc",
  "rgb": {
    "r": 64,
    "g": 87,
    "b": 188
  },
  "hsl": {
    "h": 228.871,
    "s": 49.206,
    "l": 49.412
  },
  "oklch": {
    "l": 0.49598,
    "c": 0.16068,
    "h": 269.9
  },
  "luminance": 0.11537
}

Semantic roles & 50–950 ramp

primary

#4057BC

secondary

#C9BE8F

accent

#BF4FD9

background

#F8F8FC

surface

#F0EFF9

border

#CBCAD2

text

#0C0B14

muted

#7D7C82

Preview Lab

Preview with #4057BC

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

Preview Lab → · Contrast checker → · Palette generator →