#307BB1#307BB1

#307BB1 is a mid, moderate cyan. Relative luminance 0.180; OKLCH L 56.2% C 0.111 H 243.7°. Best body text is #000000 at 4.59:1 contrast (WCAG AA passes).

Color values

HEX	#307BB1
RGB	rgb(48, 123, 177)
HSL	hsl(205, 57%, 44%)
HSV	hsv(205, 73%, 69%)
CMYK	cmyk(72.9%, 30.5%, 0%, 30.6%)
CIE-LAB	lab(49.46, -4.72, -35.23)
CIE-LCH	lch(49.46, 35.55, 262.37°)
OKLab	oklab(56.16% -0.0493 -0.0997)
OKLCH	oklch(56.16% 0.111 243.7)
XYZ	xyz(16.2346, 17.9668, 44.1988)
Luminance	0.1797 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#307BB1 #B16630

analogous

#30B1A7 #307BB1 #303BB1

triadic

#307BB1 #B1307B #7BB130

tetradic

#307BB1 #A730B1 #B16630 #3BB130

square

#307BB1 #A730B1 #B16630 #3BB130

split-complementary

#307BB1 #B1303B #B1A730

monochromatic

#163851 #235A81 #307BB1 #4F9ACF #7FB5DC

Accessibility & contrast

On white

4.57

#307BB1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.59

#307BB1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #307BB1

4.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##307BB1	#FFFFFF	#000000	##000000
##307BB1	1.00	4.57	4.59	4.59
#FFFFFF	4.57	1.00	21.00	21.00
#000000	4.59	21.00	1.00	1.00
##000000	4.59	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#627CB3

Deuteranopia (green-blind)

#5070B0

Tritanopia (blue-blind)

#00888E

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #307bb1;
/* rgb */ color: rgb(48, 123, 177);
/* oklch */ color: oklch(56.2% 0.111 243.7);

Tailwind

colors: {
  custom: {
    50: '#79a1c8',
    500: '#307bb1',
    950: '#000000',
  },
}

SCSS

$custom: #307bb1;
$custom-light: #79a1c8;
$custom-dark: #000000;

JSON

{
  "hex": "#307bb1",
  "rgb": {
    "r": 48,
    "g": 123,
    "b": 177
  },
  "hsl": {
    "h": 205.116,
    "s": 57.333,
    "l": 44.118
  },
  "oklch": {
    "l": 0.5616,
    "c": 0.11125,
    "h": 243.7
  },
  "luminance": 0.17969
}

Semantic roles & 50–950 ramp

primary

#307BB1

secondary

#C59878

accent

#8747E1

background

#F7F9FC

surface

#EEF2F8

border

#C9CCD1

text

#0A0E13

muted

#7C7E82

Preview Lab

Preview with #307BB1

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

Preview Lab → · Contrast checker → · Palette generator →