#307BB3#307BB3

#307BB3 is a mid, moderate cyan. Relative luminance 0.180; OKLCH L 56.3% C 0.114 H 244.6°. Best body text is #000000 at 4.61:1 contrast (WCAG AA passes).

Color values

HEX	#307BB3
RGB	rgb(48, 123, 179)
HSL	hsl(206, 58%, 45%)
HSV	hsv(206, 73%, 70%)
CMYK	cmyk(73.2%, 31.3%, 0%, 29.8%)
CIE-LAB	lab(49.55, -4.00, -36.23)
CIE-LCH	lch(49.55, 36.45, 263.70°)
OKLab	oklab(56.27% -0.0487 -0.1026)
OKLCH	oklch(56.27% 0.114 244.6)
XYZ	xyz(16.4354, 18.0471, 45.2563)
Luminance	0.1805 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#307BB3 #B36830

analogous

#30B3AA #307BB3 #303AB3

triadic

#307BB3 #B3307B #7BB330

tetradic

#307BB3 #AA30B3 #B36830 #3AB330

square

#307BB3 #AA30B3 #B36830 #3AB330

split-complementary

#307BB3 #B3303A #B3AA30

monochromatic

#163952 #235A83 #307BB3 #5099D0 #80B5DD

Accessibility & contrast

On white

4.56

#307BB3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.61

#307BB3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #307BB3

4.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##307BB3	#FFFFFF	#000000	##000000
##307BB3	1.00	4.56	4.61	4.61
#FFFFFF	4.56	1.00	21.00	21.00
#000000	4.61	21.00	1.00	1.00
##000000	4.61	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#617DB5

Deuteranopia (green-blind)

#4F70B2

Tritanopia (blue-blind)

#00898F

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #307bb3;
/* rgb */ color: rgb(48, 123, 179);
/* oklch */ color: oklch(56.3% 0.114 244.6);

Tailwind

colors: {
  custom: {
    50: '#79a0ca',
    500: '#307bb3',
    950: '#000000',
  },
}

SCSS

$custom: #307bb3;
$custom-light: #79a0ca;
$custom-dark: #000000;

JSON

{
  "hex": "#307bb3",
  "rgb": {
    "r": 48,
    "g": 123,
    "b": 179
  },
  "hsl": {
    "h": 205.649,
    "s": 57.709,
    "l": 44.51
  },
  "oklch": {
    "l": 0.56269,
    "c": 0.1136,
    "h": 244.6
  },
  "luminance": 0.18049
}

Semantic roles & 50–950 ramp

primary

#307BB3

secondary

#C69A79

accent

#8947E1

background

#F7F9FC

surface

#EEF2F8

border

#C9CCD1

text

#0A0E13

muted

#7C7E82

Preview Lab

Preview with #307BB3

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

Preview Lab → · Contrast checker → · Palette generator →