#3F78BF#3F78BF

#3F78BF is a mid, vivid cyan. Relative luminance 0.183; OKLCH L 56.8% C 0.126 H 255.0°. Best body text is #000000 at 4.65:1 contrast (WCAG AA passes).

Color values

HEX	#3F78BF
RGB	rgb(63, 120, 191)
HSL	hsl(213, 50%, 50%)
HSV	hsv(213, 67%, 75%)
CMYK	cmyk(67%, 37.2%, 0%, 25.1%)
CIE-LAB	lab(49.80, 4.41, -42.73)
CIE-LCH	lch(49.80, 42.96, 275.89°)
OKLab	oklab(56.81% -0.0324 -0.1214)
OKLCH	oklch(56.81% 0.126 255)
XYZ	xyz(18.1669, 18.2495, 51.8452)
Luminance	0.1825 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F78BF #BF863F

analogous

#3FB8BF #3F78BF #463FBF

triadic

#3F78BF #BF3F78 #78BF3F

tetradic

#3F78BF #BF3FB8 #BF863F #3FBF46

square

#3F78BF #BF3FB8 #BF863F #3FBF46

split-complementary

#3F78BF #BF463F #B8BF3F

monochromatic

#213E63 #305B91 #3F78BF #6D98CF #9BB9DE

Accessibility & contrast

On white

4.52

#3F78BF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.65

#3F78BF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F78BF

4.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F78BF	#FFFFFF	#000000	##000000
##3F78BF	1.00	4.52	4.65	4.65
#FFFFFF	4.52	1.00	21.00	21.00
#000000	4.65	21.00	1.00	1.00
##000000	4.65	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#587DC2

Deuteranopia (green-blind)

#4671BE

Tritanopia (blue-blind)

#008892

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #3f78bf;
/* rgb */ color: rgb(63, 120, 191);
/* oklch */ color: oklch(56.8% 0.126 255.0);

Tailwind

colors: {
  custom: {
    50: '#819ed2',
    500: '#3f78bf',
    950: '#000000',
  },
}

SCSS

$custom: #3f78bf;
$custom-light: #819ed2;
$custom-dark: #000000;

JSON

{
  "hex": "#3f78bf",
  "rgb": {
    "r": 63,
    "g": 120,
    "b": 191
  },
  "hsl": {
    "h": 213.281,
    "s": 50.394,
    "l": 49.804
  },
  "oklch": {
    "l": 0.56805,
    "c": 0.12571,
    "h": 255
  },
  "luminance": 0.18251
}

Semantic roles & 50–950 ramp

primary

#3F78BF

secondary

#CAB090

accent

#9C4EDA

background

#F8F9FC

surface

#F0F2F9

border

#CBCCD2

text

#0B0E14

muted

#7C7E82

Preview Lab

Preview with #3F78BF

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

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