#3F7BB0#3F7BB0

#3F7BB0 is a mid, moderate cyan. Relative luminance 0.184; OKLCH L 56.7% C 0.104 H 247.4°. Best body text is #000000 at 4.67:1 contrast (WCAG AA passes).

Color values

HEX	#3F7BB0
RGB	rgb(63, 123, 176)
HSL	hsl(208, 47%, 47%)
HSV	hsv(208, 64%, 69%)
CMYK	cmyk(64.2%, 30.1%, 0%, 31%)
CIE-LAB	lab(49.92, -2.63, -33.88)
CIE-LCH	lch(49.92, 33.98, 265.56°)
OKLab	oklab(56.66% -0.0397 -0.0956)
OKLCH	oklch(56.66% 0.104 247.4)
XYZ	xyz(16.9664, 18.3556, 43.7147)
Luminance	0.1836 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3F7BB0 #B0743F

analogous

#3FB0AD #3F7BB0 #3F42B0

triadic

#3F7BB0 #B03F7B #7BB03F

tetradic

#3F7BB0 #AD3FB0 #B0743F #42B03F

square

#3F7BB0 #AD3FB0 #B0743F #42B03F

split-complementary

#3F7BB0 #B03F42 #B0AD3F

monochromatic

#1F3C56 #2F5C83 #3F7BB0 #6599C8 #92B7D8

Accessibility & contrast

On white

4.50

#3F7BB0 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.67

#3F7BB0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #3F7BB0

4.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3F7BB0	#FFFFFF	#000000	##000000
##3F7BB0	1.00	4.50	4.67	4.67
#FFFFFF	4.50	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)

#647DB2

Deuteranopia (green-blind)

#5572AF

Tritanopia (blue-blind)

#00888E

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #3f7bb0;
/* rgb */ color: rgb(63, 123, 176);
/* oklch */ color: oklch(56.7% 0.104 247.4);

Tailwind

colors: {
  custom: {
    50: '#7fa1c8',
    500: '#3f7bb0',
    950: '#000000',
  },
}

SCSS

$custom: #3f7bb0;
$custom-light: #7fa1c8;
$custom-dark: #000000;

JSON

{
  "hex": "#3f7bb0",
  "rgb": {
    "r": 63,
    "g": 123,
    "b": 176
  },
  "hsl": {
    "h": 208.142,
    "s": 47.28,
    "l": 46.863
  },
  "oklch": {
    "l": 0.56659,
    "c": 0.10352,
    "h": 247.4
  },
  "luminance": 0.18357
}

Semantic roles & 50–950 ramp

primary

#3F7BB0

secondary

#C3A488

accent

#9051D7

background

#F8F9FC

surface

#EFF2F8

border

#CACCD1

text

#0B0E13

muted

#7C7E82

Preview Lab

Preview with #3F7BB0

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

Preview Lab → · Contrast checker → · Palette generator →