#259BB5#259BB5

#259BB5 is a light, moderate cyan. Relative luminance 0.272; OKLCH L 63.9% C 0.105 H 216.8°. Best body text is #000000 at 6.43:1 contrast (WCAG AA passes).

Color values

HEX	#259BB5
RGB	rgb(37, 155, 181)
HSL	hsl(191, 66%, 43%)
HSV	hsv(191, 80%, 71%)
CMYK	cmyk(79.6%, 14.4%, 0%, 29%)
CIE-LAB	lab(59.13, -22.43, -22.52)
CIE-LCH	lch(59.13, 31.79, 225.12°)
OKLab	oklab(63.87% -0.0842 -0.063)
OKLCH	oklch(63.87% 0.105 216.8)
XYZ	xyz(20.8212, 27.1696, 47.8540)
Luminance	0.2717 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#259BB5 #B53F25

analogous

#25B587 #259BB5 #2553B5

triadic

#259BB5 #B5259B #9BB525

tetradic

#259BB5 #8725B5 #B53F25 #53B525

square

#259BB5 #8725B5 #B53F25 #53B525

split-complementary

#259BB5 #B52553 #B58725

monochromatic

#10444F #1B6F82 #259BB5 #3FBCD8 #72CEE2

Accessibility & contrast

On white

3.26

#259BB5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.43

#259BB5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #259BB5

6.43:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##259BB5	#FFFFFF	#000000	##000000
##259BB5	1.00	3.26	6.43	6.43
#FFFFFF	3.26	1.00	21.00	21.00
#000000	6.43	21.00	1.00	1.00
##000000	6.43	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#8A96B6

Deuteranopia (green-blind)

#7788B5

Tritanopia (blue-blind)

#00A4A3

Achromatopsia (no color)

#8E8E8E

Design tokens & code

CSS

--color: #259bb5;
/* rgb */ color: rgb(37, 155, 181);
/* oklch */ color: oklch(63.9% 0.105 216.8);

Tailwind

colors: {
  custom: {
    50: '#78b8cb',
    500: '#259bb5',
    950: '#000000',
  },
}

SCSS

$custom: #259bb5;
$custom-light: #78b8cb;
$custom-dark: #000000;

JSON

{
  "hex": "#259bb5",
  "rgb": {
    "r": 37,
    "g": 155,
    "b": 181
  },
  "hsl": {
    "h": 190.833,
    "s": 66.055,
    "l": 42.745
  },
  "oklch": {
    "l": 0.6387,
    "c": 0.10514,
    "h": 216.8
  },
  "luminance": 0.27172
}

Semantic roles & 50–950 ramp

primary

#259BB5

secondary

#C97D6D

accent

#5E3FE9

background

#F8FBFC

surface

#EFF6F8

border

#CAD0D1

text

#0B1113

muted

#7C8082

Preview Lab

Preview with #259BB5

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

Preview Lab → · Contrast checker → · Palette generator →