#4057BB#4057BB

#4057BB is a mid, vivid blue. Relative luminance 0.115; OKLCH L 49.5% C 0.159 H 269.9°. Best body text is #FFFFFF at 6.37:1 contrast (WCAG AA passes).

Color values

HEX	#4057BB
RGB	rgb(64, 87, 187)
HSL	hsl(229, 49%, 49%)
HSV	hsv(229, 66%, 73%)
CMYK	cmyk(65.8%, 53.5%, 0%, 26.7%)
CIE-LAB	lab(40.40, 24.00, -55.46)
CIE-LCH	lch(40.40, 60.43, 293.40°)
OKLab	oklab(49.52% -0.0002 -0.1593)
OKLCH	oklch(49.52% 0.159 269.9)
XYZ	xyz(14.4891, 11.4929, 48.4589)
Luminance	0.1149 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#4057BB #BBA440

analogous

#4095BB #4057BB #6640BB

triadic

#4057BB #BB4057 #57BB40

tetradic

#4057BB #BB4095 #BBA440 #40BB66

square

#4057BB #BB4095 #BBA440 #40BB66

split-complementary

#4057BB #BB6640 #95BB40

monochromatic

#212D60 #30428D #4057BB #6C7ECD #99A6DC

Accessibility & contrast

On white

6.37

#4057BB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.30

#4057BB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #4057BB

6.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##4057BB	#FFFFFF	#000000	##FFFFFF
##4057BB	1.00	6.37	3.30	6.37
#FFFFFF	6.37	1.00	21.00	1.00
#000000	3.30	21.00	1.00	21.00
##FFFFFF	6.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1365BF

Deuteranopia (green-blind)

#005AB9

Tritanopia (blue-blind)

#006F80

Achromatopsia (no color)

#5F5F5F

Design tokens & code

CSS

--color: #4057bb;
/* rgb */ color: rgb(64, 87, 187);
/* oklch */ color: oklch(49.5% 0.159 269.9);

Tailwind

colors: {
  custom: {
    50: '#8286d0',
    500: '#4057bb',
    950: '#000000',
  },
}

SCSS

$custom: #4057bb;
$custom-light: #8286d0;
$custom-dark: #000000;

JSON

{
  "hex": "#4057bb",
  "rgb": {
    "r": 64,
    "g": 87,
    "b": 187
  },
  "hsl": {
    "h": 228.78,
    "s": 49.004,
    "l": 49.216
  },
  "oklch": {
    "l": 0.49522,
    "c": 0.1593,
    "h": 269.9
  },
  "luminance": 0.11494
}

Semantic roles & 50–950 ramp

primary

#4057BB

secondary

#C8BD8F

accent

#BF4FD9

background

#F8F8FC

surface

#F0EFF9

border

#CBCAD2

text

#0C0B14

muted

#7D7C82

Preview Lab

Preview with #4057BB

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

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