#3F8FB5#3F8FB5

#3F8FB5 is a mid, moderate cyan. Relative luminance 0.240; OKLCH L 61.6% C 0.096 H 231.9°. Best body text is #000000 at 5.81:1 contrast (WCAG AA passes).

Color values

HEX	#3F8FB5
RGB	rgb(63, 143, 181)
HSL	hsl(199, 48%, 48%)
HSV	hsv(199, 65%, 71%)
CMYK	cmyk(65.2%, 21%, 0%, 29%)
CIE-LAB	lab(56.12, -12.45, -27.10)
CIE-LCH	lch(56.12, 29.82, 245.33°)
OKLab	oklab(61.64% -0.0594 -0.0759)
OKLCH	oklch(61.64% 0.096 231.9)
XYZ	xyz(20.2096, 24.0358, 47.2814)
Luminance	0.2404 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F8FB5 #B5653F

analogous

#3FB5A0 #3F8FB5 #3F54B5

triadic

#3F8FB5 #B53F8F #8FB53F

tetradic

#3F8FB5 #A03FB5 #B5653F #54B53F

square

#3F8FB5 #A03FB5 #B5653F #54B53F

split-complementary

#3F8FB5 #B53F54 #B5A03F

monochromatic

#1F475A #2F6B88 #3F8FB5 #67AACA #94C4DA

Accessibility & contrast

On white

3.62

#3F8FB5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.81

#3F8FB5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F8FB5

5.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F8FB5	#FFFFFF	#000000	##000000
##3F8FB5	1.00	3.62	5.81	5.81
#FFFFFF	3.62	1.00	21.00	21.00
#000000	5.81	21.00	1.00	1.00
##000000	5.81	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7C8DB7

Deuteranopia (green-blind)

#6C81B4

Tritanopia (blue-blind)

#00999C

Achromatopsia (no color)

#878787

Design tokens & code

CSS

--color: #3f8fb5;
/* rgb */ color: rgb(63, 143, 181);
/* oklch */ color: oklch(61.6% 0.096 231.9);

Tailwind

colors: {
  custom: {
    50: '#81afcb',
    500: '#3f8fb5',
    950: '#000000',
  },
}

SCSS

$custom: #3f8fb5;
$custom-light: #81afcb;
$custom-dark: #000000;

JSON

{
  "hex": "#3f8fb5",
  "rgb": {
    "r": 63,
    "g": 143,
    "b": 181
  },
  "hsl": {
    "h": 199.322,
    "s": 48.361,
    "l": 47.843
  },
  "oklch": {
    "l": 0.61642,
    "c": 0.0964,
    "h": 231.9
  },
  "luminance": 0.24038
}

Semantic roles & 50–950 ramp

primary

#3F8FB5

secondary

#C59D8A

accent

#7C50D8

background

#F8FAFC

surface

#EFF4F8

border

#CACED1

text

#0B1013

muted

#7C7F82

Preview Lab

Preview with #3F8FB5

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

Preview Lab → · Contrast checker → · Palette generator →