#307BB0#307BB0

#307BB0 is a mid, moderate cyan. Relative luminance 0.179; OKLCH L 56.1% C 0.110 H 243.2°. Best body text is #000000 at 4.59:1 contrast (WCAG AA passes).

Color values

HEX	#307BB0
RGB	rgb(48, 123, 176)
HSL	hsl(205, 57%, 44%)
HSV	hsv(205, 73%, 69%)
CMYK	cmyk(72.7%, 30.1%, 0%, 31%)
CIE-LAB	lab(49.41, -5.08, -34.73)
CIE-LCH	lch(49.41, 35.10, 261.68°)
OKLab	oklab(56.11% -0.0497 -0.0982)
OKLCH	oklch(56.11% 0.11 243.2)
XYZ	xyz(16.1353, 17.9271, 43.6758)
Luminance	0.1793 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#307BB0 #B06530

analogous

#30B0A5 #307BB0 #303BB0

triadic

#307BB0 #B0307B #7BB030

tetradic

#307BB0 #A530B0 #B06530 #3BB030

square

#307BB0 #A530B0 #B06530 #3BB030

split-complementary

#307BB0 #B0303B #B0A530

monochromatic

#163850 #235980 #307BB0 #4E9ACF #7EB5DC

Accessibility & contrast

On white

4.58

#307BB0 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.59

#307BB0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #307BB0

4.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##307BB0	#FFFFFF	#000000	##000000
##307BB0	1.00	4.58	4.59	4.59
#FFFFFF	4.58	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)

#637CB2

Deuteranopia (green-blind)

#5170AF

Tritanopia (blue-blind)

#00888E

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #307bb0;
/* rgb */ color: rgb(48, 123, 176);
/* oklch */ color: oklch(56.1% 0.110 243.2);

Tailwind

colors: {
  custom: {
    50: '#79a1c8',
    500: '#307bb0',
    950: '#000000',
  },
}

SCSS

$custom: #307bb0;
$custom-light: #79a1c8;
$custom-dark: #000000;

JSON

{
  "hex": "#307bb0",
  "rgb": {
    "r": 48,
    "g": 123,
    "b": 176
  },
  "hsl": {
    "h": 204.844,
    "s": 57.143,
    "l": 43.922
  },
  "oklch": {
    "l": 0.56106,
    "c": 0.11008,
    "h": 243.2
  },
  "luminance": 0.17929
}

Semantic roles & 50–950 ramp

primary

#307BB0

secondary

#C59777

accent

#8747E0

background

#F7F9FC

surface

#EEF2F8

border

#C9CCD1

text

#0A0E13

muted

#7C7E82

Preview Lab

Preview with #307BB0

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

Preview Lab → · Contrast checker → · Palette generator →