#3F74AA#3F74AA

#3F74AA is a mid, moderate cyan. Relative luminance 0.165; OKLCH L 54.7% C 0.102 H 250.6°. Best body text is #FFFFFF at 4.90:1 contrast (WCAG AA passes).

Color values

HEX	#3F74AA
RGB	rgb(63, 116, 170)
HSL	hsl(210, 46%, 46%)
HSV	hsv(210, 63%, 67%)
CMYK	cmyk(62.9%, 31.8%, 0%, 33.3%)
CIE-LAB	lab(47.56, -0.50, -34.11)
CIE-LCH	lch(47.56, 34.11, 269.16°)
OKLab	oklab(54.7% -0.0339 -0.0963)
OKLCH	oklch(54.7% 0.102 250.6)
XYZ	xyz(15.5483, 16.4483, 40.3779)
Luminance	0.1645 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F74AA #AA753F

analogous

#3FA9AA #3F74AA #3F3FAA

triadic

#3F74AA #AA3F74 #74AA3F

tetradic

#3F74AA #AA3FA9 #AA753F #3FAA3F

square

#3F74AA #AA3FA9 #AA753F #3FAA3F

split-complementary

#3F74AA #AA3F3F #A9AA3F

monochromatic

#1E3751 #2E567D #3F74AA #6293C5 #8EB1D5

Accessibility & contrast

On white

4.90

#3F74AA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.29

#3F74AA on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3F74AA

4.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F74AA	#FFFFFF	#000000	##FFFFFF
##3F74AA	1.00	4.90	4.29	4.90
#FFFFFF	4.90	1.00	21.00	1.00
#000000	4.29	21.00	1.00	21.00
##FFFFFF	4.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5D77AC

Deuteranopia (green-blind)

#4E6CA9

Tritanopia (blue-blind)

#008187

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #3f74aa;
/* rgb */ color: rgb(63, 116, 170);
/* oklch */ color: oklch(54.7% 0.102 250.6);

Tailwind

colors: {
  custom: {
    50: '#7e9bc3',
    500: '#3f74aa',
    950: '#000000',
  },
}

SCSS

$custom: #3f74aa;
$custom-light: #7e9bc3;
$custom-dark: #000000;

JSON

{
  "hex": "#3f74aa",
  "rgb": {
    "r": 63,
    "g": 116,
    "b": 170
  },
  "hsl": {
    "h": 210.28,
    "s": 45.923,
    "l": 45.686
  },
  "oklch": {
    "l": 0.54703,
    "c": 0.10213,
    "h": 250.6
  },
  "luminance": 0.1645
}

Semantic roles & 50–950 ramp

primary

#3F74AA

secondary

#C0A385

accent

#9552D6

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0B0E12

muted

#7C7E81

Preview Lab

Preview with #3F74AA

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

Preview Lab → · Contrast checker → · Palette generator →