#3974D9#3974D9

#3974D9 is a mid, vivid blue. Relative luminance 0.184; OKLCH L 57.3% C 0.167 H 260.4°. Best body text is #000000 at 4.67:1 contrast (WCAG AA passes).

Color values

HEX	#3974D9
RGB	rgb(57, 116, 217)
HSL	hsl(218, 68%, 54%)
HSV	hsv(218, 74%, 85%)
CMYK	cmyk(73.7%, 46.5%, 0%, 14.9%)
CIE-LAB	lab(49.94, 15.40, -57.35)
CIE-LCH	lch(49.94, 59.38, 285.03°)
OKLab	oklab(57.34% -0.0278 -0.1645)
OKLCH	oklch(57.34% 0.167 260.4)
XYZ	xyz(20.4526, 18.3681, 68.0997)
Luminance	0.1837 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3974D9 #D99E39

analogous

#39C4D9 #3974D9 #4E39D9

triadic

#3974D9 #D93974 #74D939

tetradic

#3974D9 #D939C4 #D99E39 #39D94E

square

#3974D9 #D939C4 #D99E39 #39D94E

split-complementary

#3974D9 #D94E39 #C4D939

monochromatic

#183E7F #2257B3 #3974D9 #6C98E3 #A0BCED

Accessibility & contrast

On white

4.49

#3974D9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.67

#3974D9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3974D9

4.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3974D9	#FFFFFF	#000000	##000000
##3974D9	1.00	4.49	4.67	4.67
#FFFFFF	4.49	1.00	21.00	21.00
#000000	4.67	21.00	1.00	1.00
##000000	4.67	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#3E7FDD

Deuteranopia (green-blind)

#1470D7

Tritanopia (blue-blind)

#008C9C

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #3974d9;
/* rgb */ color: rgb(57, 116, 217);
/* oklch */ color: oklch(57.3% 0.167 260.4);

Tailwind

colors: {
  custom: {
    50: '#849be5',
    500: '#3974d9',
    950: '#000000',
  },
}

SCSS

$custom: #3974d9;
$custom-light: #849be5;
$custom-dark: #000000;

JSON

{
  "hex": "#3974d9",
  "rgb": {
    "r": 57,
    "g": 116,
    "b": 217
  },
  "hsl": {
    "h": 217.875,
    "s": 67.797,
    "l": 53.725
  },
  "oklch": {
    "l": 0.57337,
    "c": 0.16686,
    "h": 260.4
  },
  "luminance": 0.1837
}

Semantic roles & 50–950 ramp

primary

#3974D9

secondary

#D9C095

accent

#AB3DEB

background

#F8F9FE

surface

#F0F2FC

border

#CBCCD5

text

#0C0E16

muted

#7D7E84

Preview Lab

Preview with #3974D9

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

Preview Lab → · Contrast checker → · Palette generator →