#307BBB#307BBB

#307BBB is a mid, vivid cyan. Relative luminance 0.184; OKLCH L 56.7% C 0.123 H 247.9°. Best body text is #000000 at 4.68:1 contrast (WCAG AA passes).

Color values

HEX	#307BBB
RGB	rgb(48, 123, 187)
HSL	hsl(208, 59%, 46%)
HSV	hsv(208, 74%, 73%)
CMYK	cmyk(74.3%, 34.2%, 0%, 26.7%)
CIE-LAB	lab(49.95, -1.10, -40.22)
CIE-LCH	lch(49.95, 40.23, 268.44°)
OKLab	oklab(56.72% -0.0464 -0.1142)
OKLCH	oklch(56.72% 0.123 247.9)
XYZ	xyz(17.2681, 18.3802, 49.6417)
Luminance	0.1838 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#307BBB #BB7030

analogous

#30BBB5 #307BBB #3035BB

triadic

#307BBB #BB307B #7BBB30

tetradic

#307BBB #B530BB #BB7030 #35BB30

square

#307BBB #B530BB #BB7030 #35BB30

split-complementary

#307BBB #BB3035 #BBB530

monochromatic

#173B5A #235B8A #307BBB #5599D3 #86B6E0

Accessibility & contrast

On white

4.49

#307BBB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.68

#307BBB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #307BBB

4.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##307BBB	#FFFFFF	#000000	##000000
##307BBB	1.00	4.49	4.68	4.68
#FFFFFF	4.49	1.00	21.00	21.00
#000000	4.68	21.00	1.00	1.00
##000000	4.68	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5E7EBE

Deuteranopia (green-blind)

#4A71BA

Tritanopia (blue-blind)

#008A92

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #307bbb;
/* rgb */ color: rgb(48, 123, 187);
/* oklch */ color: oklch(56.7% 0.123 247.9);

Tailwind

colors: {
  custom: {
    50: '#7ba0d0',
    500: '#307bbb',
    950: '#000000',
  },
}

SCSS

$custom: #307bbb;
$custom-light: #7ba0d0;
$custom-dark: #000000;

JSON

{
  "hex": "#307bbb",
  "rgb": {
    "r": 48,
    "g": 123,
    "b": 187
  },
  "hsl": {
    "h": 207.626,
    "s": 59.149,
    "l": 46.078
  },
  "oklch": {
    "l": 0.56716,
    "c": 0.1233,
    "h": 247.9
  },
  "luminance": 0.18382
}

Semantic roles & 50–950 ramp

primary

#307BBB

secondary

#C9A07D

accent

#8E45E2

background

#F8F9FC

surface

#EFF2F9

border

#CACCD2

text

#0B0E14

muted

#7C7E82

Preview Lab

Preview with #307BBB

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

Preview Lab → · Contrast checker → · Palette generator →