#247BB1#247BB1

#247BB1 is a mid, moderate cyan. Relative luminance 0.177; OKLCH L 55.8% C 0.116 H 241.3°. Best body text is #FFFFFF at 4.62:1 contrast (WCAG AA passes).

Color values

HEX	#247BB1
RGB	rgb(36, 123, 177)
HSL	hsl(203, 66%, 42%)
HSV	hsv(203, 80%, 69%)
CMYK	cmyk(79.7%, 30.5%, 0%, 30.6%)
CIE-LAB	lab(49.15, -6.21, -35.74)
CIE-LCH	lch(49.15, 36.27, 260.14°)
OKLab	oklab(55.83% -0.0555 -0.1013)
OKLCH	oklch(55.83% 0.116 241.3)
XYZ	xyz(15.7432, 17.7134, 44.1757)
Luminance	0.1772 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#247BB1 #B15A24

analogous

#24B1A1 #247BB1 #2434B1

triadic

#247BB1 #B1247B #7BB124

tetradic

#247BB1 #A124B1 #B15A24 #34B124

square

#247BB1 #A124B1 #B15A24 #34B124

split-complementary

#247BB1 #B12434 #B1A124

monochromatic

#0F344B #1A587E #247BB1 #3B9BD7 #6EB5E1

Accessibility & contrast

On white

4.62

#247BB1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.54

#247BB1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #247BB1

4.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##247BB1	#FFFFFF	#000000	##FFFFFF
##247BB1	1.00	4.62	4.54	4.62
#FFFFFF	4.62	1.00	21.00	1.00
#000000	4.54	21.00	1.00	21.00
##FFFFFF	4.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#627CB3

Deuteranopia (green-blind)

#4E6FB0

Tritanopia (blue-blind)

#00888E

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #247bb1;
/* rgb */ color: rgb(36, 123, 177);
/* oklch */ color: oklch(55.8% 0.116 241.3);

Tailwind

colors: {
  custom: {
    50: '#75a1c8',
    500: '#247bb1',
    950: '#000000',
  },
}

SCSS

$custom: #247bb1;
$custom-light: #75a1c8;
$custom-dark: #000000;

JSON

{
  "hex": "#247bb1",
  "rgb": {
    "r": 36,
    "g": 123,
    "b": 177
  },
  "hsl": {
    "h": 202.979,
    "s": 66.197,
    "l": 41.765
  },
  "oklch": {
    "l": 0.55827,
    "c": 0.11551,
    "h": 241.3
  },
  "luminance": 0.17715
}

Semantic roles & 50–950 ramp

primary

#247BB1

secondary

#C88D69

accent

#803FE9

background

#F7F9FC

surface

#EEF2F8

border

#C9CCD1

text

#0A0E13

muted

#7C7E82

Preview Lab

Preview with #247BB1

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

Preview Lab → · Contrast checker → · Palette generator →