#255B9B#255B9B

#255B9B is a mid, moderate cyan. Relative luminance 0.102; OKLCH L 46.9% C 0.118 H 254.7°. Best body text is #FFFFFF at 6.89:1 contrast (WCAG AA passes).

Color values

HEX	#255B9B
RGB	rgb(37, 91, 155)
HSL	hsl(213, 61%, 38%)
HSV	hsv(213, 76%, 61%)
CMYK	cmyk(76.1%, 41.3%, 0%, 39.2%)
CIE-LAB	lab(38.27, 5.36, -40.00)
CIE-LCH	lch(38.27, 40.35, 277.63°)
OKLab	oklab(46.9% -0.0313 -0.1142)
OKLCH	oklch(46.9% 0.118 254.7)
XYZ	xyz(10.4182, 10.2409, 32.4316)
Luminance	0.1024 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#255B9B #9B6525

analogous

#25969B #255B9B #2A259B

triadic

#255B9B #9B255B #5B9B25

tetradic

#255B9B #9B2596 #9B6525 #259B2A

square

#255B9B #9B2596 #9B6525 #259B2A

split-complementary

#255B9B #9B2A25 #969B25

monochromatic

#0D2138 #193E6A #255B9B #3178CC #6198D9

Accessibility & contrast

On white

6.89

#255B9B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.05

#255B9B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #255B9B

6.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##255B9B	#FFFFFF	#000000	##FFFFFF
##255B9B	1.00	6.89	3.05	6.89
#FFFFFF	6.89	1.00	21.00	1.00
#000000	3.05	21.00	1.00	21.00
##FFFFFF	6.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3C609E

Deuteranopia (green-blind)

#29559A

Tritanopia (blue-blind)

#006A73

Achromatopsia (no color)

#5A5A5A

Design tokens & code

CSS

--color: #255b9b;
/* rgb */ color: rgb(37, 91, 155);
/* oklch */ color: oklch(46.9% 0.118 254.7);

Tailwind

colors: {
  custom: {
    50: '#7088b9',
    500: '#255b9b',
    950: '#000000',
  },
}

SCSS

$custom: #255b9b;
$custom-light: #7088b9;
$custom-dark: #000000;

JSON

{
  "hex": "#255b9b",
  "rgb": {
    "r": 37,
    "g": 91,
    "b": 155
  },
  "hsl": {
    "h": 212.542,
    "s": 61.458,
    "l": 37.647
  },
  "oklch": {
    "l": 0.46903,
    "c": 0.11846,
    "h": 254.7
  },
  "luminance": 0.10242
}

Semantic roles & 50–950 ramp

primary

#255B9B

secondary

#BF925D

accent

#9B43E5

background

#F7F8FB

surface

#EDEFF6

border

#C8CAD0

text

#090B11

muted

#7B7C80

Preview Lab

Preview with #255B9B

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

Preview Lab → · Contrast checker → · Palette generator →