#255D9B#255D9B

#255D9B is a mid, moderate cyan. Relative luminance 0.106; OKLCH L 47.4% C 0.116 H 253.4°. Best body text is #FFFFFF at 6.74:1 contrast (WCAG AA passes).

Color values

HEX	#255D9B
RGB	rgb(37, 93, 155)
HSL	hsl(212, 61%, 38%)
HSV	hsv(212, 76%, 61%)
CMYK	cmyk(76.1%, 40%, 0%, 39.2%)
CIE-LAB	lab(38.88, 4.07, -39.03)
CIE-LCH	lch(38.88, 39.24, 275.95°)
OKLab	oklab(47.37% -0.0332 -0.1114)
OKLCH	oklch(47.37% 0.116 253.4)
XYZ	xyz(10.5915, 10.5874, 32.4894)
Luminance	0.1059 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#255D9B #9B6325

analogous

#25989B #255D9B #28259B

triadic

#255D9B #9B255D #5D9B25

tetradic

#255D9B #9B2598 #9B6325 #259B28

square

#255D9B #9B2598 #9B6325 #259B28

split-complementary

#255D9B #9B2825 #989B25

monochromatic

#0D2238 #193F6A #255D9B #317BCC #619AD9

Accessibility & contrast

On white

6.74

#255D9B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.12

#255D9B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #255D9B

6.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##255D9B	#FFFFFF	#000000	##FFFFFF
##255D9B	1.00	6.74	3.12	6.74
#FFFFFF	6.74	1.00	21.00	1.00
#000000	3.12	21.00	1.00	21.00
##FFFFFF	6.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#40619D

Deuteranopia (green-blind)

#2D579A

Tritanopia (blue-blind)

#006C74

Achromatopsia (no color)

#5C5C5C

Design tokens & code

CSS

--color: #255d9b;
/* rgb */ color: rgb(37, 93, 155);
/* oklch */ color: oklch(47.4% 0.116 253.4);

Tailwind

colors: {
  custom: {
    50: '#708ab9',
    500: '#255d9b',
    950: '#000000',
  },
}

SCSS

$custom: #255d9b;
$custom-light: #708ab9;
$custom-dark: #000000;

JSON

{
  "hex": "#255d9b",
  "rgb": {
    "r": 37,
    "g": 93,
    "b": 155
  },
  "hsl": {
    "h": 211.525,
    "s": 61.458,
    "l": 37.647
  },
  "oklch": {
    "l": 0.47374,
    "c": 0.11621,
    "h": 253.4
  },
  "luminance": 0.10589
}

Semantic roles & 50–950 ramp

primary

#255D9B

secondary

#BF905D

accent

#9843E5

background

#F7F8FB

surface

#EDF0F6

border

#C8CBD0

text

#090B11

muted

#7B7C80

Preview Lab

Preview with #255D9B

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

Preview Lab → · Contrast checker → · Palette generator →